{"id":9788,"date":"2024-04-27T17:16:22","date_gmt":"2024-04-27T17:16:22","guid":{"rendered":"https:\/\/arzhost.com\/blogs\/?p=9788"},"modified":"2025-01-08T19:45:35","modified_gmt":"2025-01-08T14:45:35","slug":"how-to-fix-cumulative-layout-shift-cls-issues","status":"publish","type":"post","link":"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/","title":{"rendered":"How To Fix Cumulative Layout Shift (CLS) Issues"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Overview_of_Cumulative_Layout_Shift_CLS_How_It_Works\" >Overview of Cumulative Layout Shift (CLS): How It Works<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#What_is_Cumulative_Layout_Shift_CLS_Definition_and_Explanation_of_CLS\" >What is Cumulative Layout Shift (CLS): Definition and Explanation of CLS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#What_Causes_Cumulative_Layout_Shift_Common_Causes_and_Triggers\" >What Causes Cumulative Layout Shift: Common Causes and Triggers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Why_is_CLS_Important_The_Importance_of_CLS_in_Web_Design_and_UX\" >Why is CLS Important: The Importance of CLS in Web Design and UX<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Never_Worry_for_Renewals_Again_Get_Lifetime_Hosting_Today\" >Never Worry for Renewals Again: Get Lifetime Hosting Today!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Importance_for_SEO_How_CLS_Affects_Search_Engine_Optimization\" >Importance for SEO: How CLS Affects Search Engine Optimization<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Building_Trust_and_Credibility_The_Role_of_CLS_in_Establishing_Trust_with_Users\" >Building Trust and Credibility: The Role of CLS in Establishing Trust with Users<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Explain_Good_or_Poor_Cumulative_Layout_Shift_CLS_Characteristics_of_Good_and_Poor_CLS\" >Explain Good or Poor Cumulative Layout Shift (CLS): Characteristics of Good and Poor CLS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Factors_Contributing_to_Good_or_Poor_CLS_Key_Factors_Impacting_CLS_Scores\" >Factors Contributing to Good or Poor CLS: Key Factors Impacting CLS Scores<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#How_to_Check_Google_CLS_Methods_and_Tools_for_Checking_CLS_Scores\" >How to Check Google CLS]: Methods and Tools for Checking CLS Scores<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#What_is_a_Good_CLS_Score_Understanding_Optimal_CLS_Scores\" >What is a Good CLS Score: Understanding Optimal CLS Scores<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#How_Do_You_Measure_Cumulative_Layout_Shift_Techniques_and_Metrics_for_Measuring_CLS\" >How Do You Measure Cumulative Layout Shift: Techniques and Metrics for Measuring CLS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Secure_Your_Dedicated_Server_Today%E2%80%94Limited-Time_Discount_Available\" >Secure Your Dedicated Server Today\u2014Limited-Time Discount Available!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Strategies_and_Best_Practices_for_Reducing_CLS_Improve_Cumulative_Layout_Shift\" >Strategies and Best Practices for Reducing CLS &amp; Improve Cumulative Layout Shift<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#Conclusion\" >Conclusion&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#FAQS_Frequently_Asked_Questions\" >FAQS (Frequently Asked Questions)<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#1_What_is_Cumulative_Layout_Shift_CLS\" >1: What is Cumulative Layout Shift (CLS)?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#2_How_is_Cumulative_Layout_Shift_calculated\" >2: How is Cumulative Layout Shift calculated?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#3_What_are_the_causes_of_Cumulative_Layout_Shift\" >3: What are the causes of Cumulative Layout Shift?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#4_Why_is_Cumulative_Layout_Shift_important_for_web_performance\" >4: Why is Cumulative Layout Shift important for web performance?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-cumulative-layout-shift-cls-issues\/#5_How_can_Cumulative_Layout_Shift_be_optimized\" >5: How can Cumulative Layout Shift be optimized?<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview_of_Cumulative_Layout_Shift_CLS_How_It_Works\"><\/span>Overview of Cumulative Layout Shift (CLS): How It Works<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>User experience is king in the world of web development. Pursuing more convenient and enjoyable website browsing, developers are always on the lookout for opportunities to enhance elements of site performance.&nbsp;<\/p>\n\n\n\n<p>In this light, one of the metrics that has gained especially notable <strong>popularity is Cumulative Layout Shift.<\/strong> This post scrutinizes what <strong>CLS stands for<\/strong>, why it is important, and how it influences users\u2019 experience and a website\u2019s rating.<\/p>\n\n\n\n<p>Everyone has experienced this: trying to select an option on a website, the page suddenly slides away just before we click, causing us to click on something accidentally. Oh well!&nbsp;<\/p>\n\n\n\n<p>This slow and irritating behavior of the website corresponds to a game of &#8220;down low, too slow.&#8221; Thankfully, Google&#8217;s Core Web Vitals, a set of measures that help site owners measure and enhance the user experience of their web pages, have made website developers more motivated to enhance their user experience.<\/p>\n\n\n\n<p>One of these <strong>important metrics is Cumulative Layout Shift<\/strong>, which gauges&nbsp;a website&#8217;s &#8220;jumpiness&#8221; or how it sporadically shifts as elements load.&nbsp;<\/p>\n\n\n\n<p>Let&#8217;s examine this measure in more detail in out <a href=\"https:\/\/arzhost.com\/blogs\/\"><strong>Blog<\/strong><\/a> and discuss how you can ensure that your website complies with best practices to improve user experience and search engine ranking.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_Cumulative_Layout_Shift_CLS_Definition_and_Explanation_of_CLS\"><\/span><strong>What is Cumulative Layout Shift (CLS)<\/strong>: Definition and Explanation of CLS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Cumulative Layout Shift (CLS)<\/strong> is a key metric used to measure the visual stability of a webpage as it loads. Essentially, it quantifies how much the content of a webpage shifts around as the page loads and elements reposition themselves.&nbsp;<\/p>\n\n\n\n<p>When elements on a webpage, such as images, ads, or fonts, load at different times or change size dynamically without reserving adequate space, it can lead to a poor user experience by causing unexpected layout shifts. These sudden shifts can be frustrating for users, especially if they are trying to interact with elements that are moving around.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS.webp\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"536\" title=\"What is Cumulative Layout Shift (CLS)\" src=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS-1024x536.webp\" alt=\"What is Cumulative Layout Shift (CLS)\" class=\"wp-image-9792\" srcset=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS-1024x536.webp 1024w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS-300x157.webp 300w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS-768x402.webp 768w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS-150x79.webp 150w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS-450x236.webp 450w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/What-is-Cumulative-Layout-Shift-CLS.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">What is Cumulative Layout Shift (CLS)<\/figcaption><\/figure>\n\n\n\n<p><strong>CLS is calculated<\/strong> by measuring the cumulative impact of layout shifts that occur during the entire lifespan of the page load. It considers both the distance that elements move and their impact on the viewport size, providing a comprehensive assessment of layout stability.&nbsp;<\/p>\n\n\n\n<p>A low <strong>CLS score<\/strong> indicates that the webpage is more visually stable, while a high <strong>CLS score suggests<\/strong> that users are likely experiencing disruptive layout shifts.<\/p>\n\n\n\n<p>Web developers and designers aim to<strong> minimize CLS<\/strong> by implementing best practices such as specifying dimensions for images and videos, reserving space for dynamically loaded content, and <strong>avoiding actions<\/strong> that trigger sudden layout changes.&nbsp;<\/p>\n\n\n\n<p>By optimizing for a <strong>low CLS score<\/strong>, they can enhance the user experience and reduce the likelihood of frustration caused by unexpected layout shifts.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Causes_Cumulative_Layout_Shift_Common_Causes_and_Triggers\"><\/span><strong>What Causes Cumulative Layout Shift: Common Causes and Triggers<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>One measure of visual stability on <strong>websites&nbsp;is Cumulative Layout Shift<\/strong> (CLS). This describes sudden changes in how a webpage loads, which can irritate users and provide for a worse-than-ideal&nbsp;user experience.&nbsp;<\/p>\n\n\n\n<p><strong>High CLS scores<\/strong> have the potential to discourage users and have an impact on metrics like conversion and bounce rates.&nbsp;<\/p>\n\n\n\n<p><strong>To successfully solve this issue, web developers must have a thorough understanding of the causes of CLS.<\/strong><\/p>\n\n\n\n<div id=\"affiliate-style-eb0895ad-b027-4c66-bc26-3db4206cbe64\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-eb0895 affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>Images and Media without Dimensions:<\/strong> One common culprit behind CLS is <a href=\"https:\/\/arzhost.com\/blogs\/image-optimization-for-web-hosting\/\"><strong>Bad Image Optimization<\/strong><\/a> and media elements being rendered without predefined dimensions. When a browser encounters an image or video without specified dimensions, it may initially allocate space for the content based on estimated dimensions. As the actual dimensions load, it leads to sudden shifts in the layout, contributing to CLS.<\/li><li><strong>Dynamic Content Injection:<\/strong> Websites that dynamically inject content into the page after initial load can experience CLS. This occurs when new content is added above existing content, pushing down the rest of the page and causing layout shifts. Examples include ads loading asynchronously or social media widgets dynamically updating with new content.<\/li><li><strong>Web Fonts Loading Delay<em>:<\/em><\/strong> <a href=\"https:\/\/arzhost.com\/blogs\/top-15-website-design-trends\/\"><strong>Modern Web Design<\/strong><\/a> often incorporates custom web fonts to enhance visual appeal. However, if the web fonts take time to load, it can lead to text elements initially rendering with fallback fonts before switching to the desired custom fonts. This transition can cause noticeable shifts in text layout, contributing to CLS.<\/li><li><strong>Asynchronous JavaScript Execution:<\/strong> JavaScript plays a pivotal role in creating interactive and dynamic web experiences. However, when JavaScript code executes asynchronously or delays page rendering, it can disrupt the layout. For instance, if <strong>JavaScript modifies <\/strong>the size or position of elements after the initial rendering, it can trigger layout shifts.<\/li><li><strong>Ads and Third-Party Widgets:<\/strong> Integrating third-party content such as ads, social media widgets, or embedded <strong>videos introduces dependencies <\/strong>on external servers. If these resources load slower than the rest of the page or dynamically resize upon loading, they can cause significant layout shifts, especially if they load above the main content.<\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<ol class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<p>A website&#8217;s efficacy and user experience may be <strong>compromised by cumulative layout shifts.<\/strong> Through comprehension of the typical reasons behind CLS and the application of efficient mitigation techniques, developers can produce more dependable and intuitive online environments.\u00a0<\/p>\n\n\n\n<p><strong>Reducing CLS<\/strong> and giving users a more seamless <a href=\"https:\/\/arzhost.com\/blogs\/browser-caching-for-faster-user-experience\/\"><strong>Browsing Experience<\/strong> <\/a>require prioritizing performance optimization and using best practices in web construction.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_is_CLS_Important_The_Importance_of_CLS_in_Web_Design_and_UX\"><\/span><strong>Why is CLS Important<\/strong>: The Importance of CLS in Web Design and UX<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Both your <strong><a href=\"https:\/\/arzhost.com\/blogs\/importance-of-higher-seo-rankings\/\">Search Engine Ranking<\/a><\/strong> and the experience of your visitors depend on your understanding of CLS.<\/p>\n\n\n\n<p>When it comes to the functionality of your website, your visitors have high expectations. 93% of users claimed to have abandoned a website in 2020 as a result of improper loading.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important.webp\"><img decoding=\"async\" width=\"1024\" height=\"536\" title=\"Why is CLS Important\" src=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important-1024x536.webp\" alt=\"Why is CLS Important\" class=\"wp-image-9791\" srcset=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important-1024x536.webp 1024w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important-300x157.webp 300w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important-768x402.webp 768w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important-150x79.webp 150w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important-450x236.webp 450w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Why-is-CLS-Important.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Why is CLS Important<\/figcaption><\/figure>\n\n\n\n<p>Visitors to your website will look for another to browse if it loads slowly or exhibits unexpected behavior. If visitors do stay, a high CLS score is probably going to lead to usability issues such as selecting the incorrect option, leaving your website too soon, or having sections of it entirely missing.<\/p>\n\n\n\n<p>The fact that so many people use their smartphones for internet browsing just makes the issue worse. Any website transitions or layout changes will undoubtedly have a significant effect on the <strong>mobile user experience<\/strong> when someone is browsing your site on a small screen.<\/p>\n\n\n\n<p>Providing a positive user experience to your clients requires optimizing your website and minimizing cumulative layout shifts.&nbsp;<\/p>\n\n\n\n<p>Second, Google uses page performance to determine a site&#8217;s ranking. A higher search ranking is the outcome of improved user experience. Your website will be penalized if it doesn&#8217;t adhere to the requirements outlined by Google in its Core Web Vitals criteria.<\/p>\n\n\n\n<p>Google does not want to send users to poorly performing websites. Your website may rank higher if it adheres to CLS best practices. Furthermore, as 68% of online interactions begin with a search, it is essential to ensure that your website appears on the search results page to attract inbound visitors.<\/p>\n\n\n\n<div class=\"wp-block-uagb-call-to-action uagb-block-62900d40 wp-block-button uag-blocks-common-selector\" style=\"--z-index-desktop:479;;--z-index-tablet:undefined;;--z-index-mobile:undefined;\"><div class=\"uagb-cta__wrap\"><h2 class=\"uagb-cta__title\"><span class=\"ez-toc-section\" id=\"Never_Worry_for_Renewals_Again_Get_Lifetime_Hosting_Today\"><\/span><a href=\"https:\/\/arzhost.com\/lifetime-web-hosting\/\" data-type=\"link\" data-id=\"https:\/\/arzhost.com\/dedicated-servers\/\"><\/a><a href=\"https:\/\/arzhost.com\/web-hosting\/\" target=\"_blank\" rel=\"noreferrer noopener\">Never Worry for Renewals Again: Get Lifetime Hosting Today!<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"uagb-cta__desc\">Lifetime Hosting for Your Website by <strong><a href=\"https:\/\/arzhost.com\/\" data-type=\"link\" data-id=\"https:\/\/arzhost.com\/\">ARZ Host<\/a><\/strong> \u2013 Only $70 for Unlimited Access. Buy Now!<\/p><\/div><div class=\"uagb-cta__buttons\"><a href=\"https:\/\/arzhost.com\/lifetime-web-hosting\/\" class=\"uagb-cta__button-link-wrapper wp-block-button__link\" target=\"_self\" rel=\"noopener noreferrer\">Read More<\/a><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Importance_for_SEO_How_CLS_Affects_Search_Engine_Optimization\"><\/span><strong>Importance for SEO<\/strong>: How CLS Affects Search Engine Optimization<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Search engines, particularly Google, <strong>prioritize user experience<\/strong> when ranking websites. In 2020, Google announced that CLS, among other Core Web Vitals, would become a ranking factor.<\/p>\n\n\n\n<p>Websites with poor CLS may find themselves pushed down in search results, affecting their organic traffic and visibility.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Building_Trust_and_Credibility_The_Role_of_CLS_in_Establishing_Trust_with_Users\"><\/span><strong>Building Trust and Credibility<\/strong>: The Role of CLS in Establishing Trust with Users<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>A website that prioritizes stability and consistency in its layout instills trust and credibility in its users. When elements don&#8217;t unexpectedly move around, users feel more confident navigating the site, making purchases, or consuming content. Trust is a cornerstone of successful online interactions, and minimizing CLS is a step towards earning that trust.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Explain_Good_or_Poor_Cumulative_Layout_Shift_CLS_Characteristics_of_Good_and_Poor_CLS\"><\/span><strong>Explain Good or Poor Cumulative Layout Shift (CLS)<\/strong>: Characteristics of Good and Poor CLS<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p><strong>Cumulative Layout Shift (CLS)<\/strong> is a metric that assesses how often webpages unexpectedly jump around while loading. A good CLS means the page is visually stable, providing a smooth user experience. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift-.webp\"><img decoding=\"async\" width=\"1024\" height=\"536\" title=\"Explain Good or Poor Cumulative Layout Shift\" src=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift--1024x536.webp\" alt=\"Explain Good or Poor Cumulative Layout Shift\" class=\"wp-image-9789\" srcset=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift--1024x536.webp 1024w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift--300x157.webp 300w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift--768x402.webp 768w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift--150x79.webp 150w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift--450x236.webp 450w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/Explain-Good-or-Poor-Cumulative-Layout-Shift-.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Explain Good or Poor Cumulative Layout Shift<\/figcaption><\/figure>\n\n\n\n<p><strong>Poor CLS results <\/strong>in a frustrating experience for visitors as content shifts on the screen.<\/p>\n\n\n\n<p><strong>Good CLS:<\/strong><\/p>\n\n\n\n<div id=\"affiliate-style-78690c62-ae72-41b7-8c50-55bdbd8415f5\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-78690c affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>Score:<\/strong> A CLS score of 0.1 or below is considered good. This means there&#8217;s minimal unexpected layout shifting on the webpage.<\/li><li><strong>User Experience:<\/strong> Users can easily read and interact with the page without disruptions caused by content jumping around.<\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<p><strong>Poor CLS:<\/strong><\/p>\n\n\n\n<div id=\"affiliate-style-01564cf2-a543-464a-af05-b10b2adba841\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-01564c affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>Score:<\/strong> A CLS score above 0.25 is considered poor. This indicates frequent or significant layout shifts that hinder the user experience.<\/li><li><strong>User Experience:<\/strong> Users may get frustrated as they try to read content that keeps moving, or they might accidentally click on the wrong element due to layout shifts.<\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<p><strong>Here&#8217;s a breakdown of the CLS scoring according to WebDAV:<\/strong><\/p>\n\n\n\n<div id=\"affiliate-style-5c92e9a0-e105-489a-a4f3-1fd2898d3215\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-5c92e9 affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>\u201cGood\u201d CLS: Below 0.10<\/strong><\/li><li><strong>\u201cNeeds Improvement\u201d CLS: Between 0.10 and 0.25<\/strong><\/li><li><strong>\u201cPoor\u201d CLS: Above 0.25<\/strong><\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<p>There are tools available to help you measure the CLS of your web pages. By monitoring and improving your CLS score, you can ensure a <strong>better user experience<\/strong> for those visiting your site.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Factors_Contributing_to_Good_or_Poor_CLS_Key_Factors_Impacting_CLS_Scores\"><\/span><strong>Factors Contributing to Good or Poor CLS<\/strong>: Key Factors Impacting CLS Scores<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Several <strong>factors influence the cumulative layout shift <\/strong>of a webpage. Understanding these factors is crucial for developers and designers aiming to <strong>optimize CLS<\/strong>:<\/p>\n\n\n\n<div id=\"affiliate-style-d6735e00-bbe5-4c21-bf47-1752a7711b29\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-d6735e affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>Image and Video Loading:<\/strong> Images and videos are common culprits behind layout shifts. When these media elements load dynamically without specified dimensions, they can cause content to reflow, leading to shifts. Using placeholder elements with defined aspect ratios can mitigate this issue.<\/li><li><strong>Ads and Third-Party Scripts:<\/strong> Advertisements and third-party scripts often load asynchronously, which can disrupt the layout of a webpage. <a href=\"https:\/\/arzhost.com\/blogs\/optimizing-your-website-speed-for-seo\/\"><strong>Implementing Lazy Loading<\/strong> <\/a>for these elements and optimizing their loading processes can minimize layout shifts.<\/li><li><strong>Font Loading:<\/strong> If text content on a webpage changes size or style after initial load due to font loading, it can cause layout shifts. Ensuring consistent font loading strategies and utilizing font-display properties can help maintain layout stability.<\/li><li><strong>Dynamic Content:<\/strong> Content that loads dynamically, such as chat widgets or recommendation modules, can trigger layout shifts if their dimensions are not predefined. Developers should anticipate and account for such content to prevent unexpected shifts.<\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Check_Google_CLS_Methods_and_Tools_for_Checking_CLS_Scores\"><\/span><strong>How to Check Google CLS<\/strong>]: Methods and Tools for Checking CLS Scores<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Numerous methods exist for verifying your CLS. However, utilizing Google&#8217;s PageSpeed Insights tool is a smart place to start.&nbsp;<\/p>\n\n\n\n<p>This tool evaluates CLS for your web pages on desktop and <strong>mobile devices.<\/strong><\/p>\n\n\n\n<p>In the tool, type the URL of your page and select <strong>&#8220;Analyze.&#8221;<\/strong><\/p>\n\n\n\n<p>Your CLS performance will then be reported by the tool. in addition to how well you do across other Core Web Vitals KPIs.<\/p>\n\n\n\n<p>However, this tool can only examine one page at once.<\/p>\n\n\n\n<p>Use SEMrush\u2019s Site Audit tool to verify CLS for several pages on your website.<\/p>\n\n\n\n<p>Launch the tool, create a project, and perform your first crawl.<\/p>\n\n\n\n<p>After the crawl is finished, select <strong>&#8220;View details&#8221;<\/strong> under <strong>&#8220;Core Web Vitals.&#8221;<\/strong><\/p>\n\n\n\n<p>This will cause your website&#8217;s Core Web Vitals performance report to open.<\/p>\n\n\n\n<p>Your CLS data is displayed when you scroll down. and suggestions for enhancements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_a_Good_CLS_Score_Understanding_Optimal_CLS_Scores\"><\/span><strong>What is a Good CLS Score<\/strong>: Understanding Optimal CLS Scores<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A good Cumulative Layout Shift (CLS) score is typically one that indicates a minimal amount of unexpected layout shifts occurring during the loading and rendering of a web page. CLS measures the visual stability of a webpage, particularly how many elements move around as the page loads, which can be disruptive to users.<\/p>\n\n\n\n<p>CLS is scored from 0 to 1, with lower scores indicating better visual stability. A score below 0.1 is generally considered good, indicating that users are unlikely to experience significant layout shifts while interacting with the page.&nbsp;<\/p>\n\n\n\n<p>Scores between 0.1 and 0.25 may suggest some room for improvement, as there could be occasional shifts that might distract users but are not overly disruptive.<\/p>\n\n\n\n<p>However, it&#8217;s essential to remember that the interpretation of CLS scores can vary depending on the context of the webpage and user expectations.&nbsp;<\/p>\n\n\n\n<p>For example, pages with interactive elements or dynamically loading content might naturally have slightly higher CLS scores, but as long as the shifts are well-managed and not jarring to users, they may still provide a good user experience.&nbsp;<\/p>\n\n\n\n<p>Therefore, while aiming for a CLS score below 0.1 is a common goal, the ultimate measure of success is how well the page maintains visual stability and usability for its intended audience.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Do_You_Measure_Cumulative_Layout_Shift_Techniques_and_Metrics_for_Measuring_CLS\"><\/span><strong>How Do You Measure Cumulative Layout Shift: Techniques and Metrics for Measuring CLS<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The good thing is that you can easily <a href=\"https:\/\/arzhost.com\/blogs\/importance-of-fast-website-loading-speed\/\"><strong>Analyze Your Page Speed<\/strong><\/a> using <strong>Google&#8217;s PageSpeed Insights tool <\/strong>or <strong>Lighthouse <\/strong>Tools in the Chrome browser, so you don&#8217;t need to measure CLS yourself.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift.webp\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"536\" title=\"How do you measure Cumulative Layout Shift\" src=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift-1024x536.webp\" alt=\"How do you measure Cumulative Layout Shift\" class=\"wp-image-9790\" srcset=\"https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift-1024x536.webp 1024w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift-300x157.webp 300w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift-768x402.webp 768w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift-150x79.webp 150w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift-450x236.webp 450w, https:\/\/arzhost.com\/blogs\/wp-content\/uploads\/2024\/04\/How-do-you-measure-Cumulative-Layout-Shift.webp 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<p>There are a few ways to measure Cumulative Layout Shift (CLS), both manually and with the help of automated tools. Here are the common methods:<\/p>\n\n\n\n<div id=\"affiliate-style-f510a796-460f-437a-bff8-de776a3bd525\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-f510a7 affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>Using Google PageSpeed Insights:<\/strong> This free tool by Google analyses your webpage and provides a CLS score along with other performance metrics. Simply enter your URL in the tool and hit analyze.<\/li><li><strong>Using Chrome DevTools Lighthouse:<\/strong> This built-in tool in Chrome DevTools offers a more detailed analysis. Open the webpage in Chrome, right-click anywhere on the page, and select &#8220;Inspect&#8221;. Then navigate to the Lighthouse tab and run a performance test. The report will include a CLS score and diagnostics to pinpoint the elements causing layout shifts.<\/li><li><strong>Using Third-party tools:<\/strong> Several third-party website monitoring tools like DebugBear can measure CLS over time and provide insights into real user data and lab tests.<\/li><li><strong>Using the Layout Instability API (programmatically):<\/strong> For developers, the Layout Instability API allows measuring layout shifts programmatically using JavaScript. This method involves logging unexpected layout shift entries and calculating the CLS value based on the impact and distance fractions.<\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<p>Remember, CLS is a score (not time in milliseconds) and ranges from good (0.1 or less) to needs improvement (above 0.1).<\/p>\n\n\n\n<div class=\"wp-block-uagb-call-to-action uagb-block-ea34b2e4 wp-block-button uag-blocks-common-selector\" style=\"--z-index-desktop:479;;--z-index-tablet:undefined;;--z-index-mobile:undefined;\"><div class=\"uagb-cta__wrap\"><h2 class=\"uagb-cta__title\"><span class=\"ez-toc-section\" id=\"Secure_Your_Dedicated_Server_Today%E2%80%94Limited-Time_Discount_Available\"><\/span><a href=\"https:\/\/arzhost.com\/dedicated-servers\/\" data-type=\"link\" data-id=\"https:\/\/arzhost.com\/dedicated-servers\/\">Secure Your Dedicated Server Today\u2014Limited-Time Discount Available!<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"uagb-cta__desc\">Experience Power with Dedicated Servers &#8211; Free Setup with the server at just <strong>$100\/month<\/strong><\/p><\/div><div class=\"uagb-cta__buttons\"><a href=\"https:\/\/arzhost.com\/dedicated-servers\/\" class=\"uagb-cta__button-link-wrapper wp-block-button__link\" target=\"_self\" rel=\"noopener noreferrer\">Read More<\/a><\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Strategies_and_Best_Practices_for_Reducing_CLS_Improve_Cumulative_Layout_Shift\"><\/span><strong>Strategies and Best Practices for Reducing CLS<\/strong> &amp; Improve Cumulative Layout Shift<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Cumulative Layout Shift (CLS) can be frustrating for users when elements on a webpage jump around unexpectedly as the page loads. Luckily, there are steps you can take to improve your CLS score and create a more stable user experience. <\/p>\n\n\n\n<p>Here are some key ways to tackle CLS:<\/p>\n\n\n\n<div id=\"affiliate-style-f1d9b350-7bf2-4739-819c-dcce5af73367\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-f1d9b3 affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>Reserve space for images and ads:<\/strong>\u00a0 Instead of letting images and ads load wherever they please, set their dimensions in advance. This tells the browser how much space to allocate, preventing layout shifts when the content finally loads.<\/li><li><strong>Preload fonts:<\/strong>\u00a0 Fonts can also cause CLS if they take a long time to load. Preloading fonts ensures they&#8217;re downloaded before the rest of the page content, preventing elements from jumping around as fonts render.<\/li><li><strong>Address late-loaded content:<\/strong>\u00a0 Content that loads after the initial page render, like ads or social media plugins, can be a major culprit for CLS.\u00a0 If possible, try to avoid late-loaded content in critical areas of your webpage.\u00a0 For unavoidable late-loading content, consider placing it lower in the viewport where it will cause less disruption.<\/li><li><strong>Use CSS transitions:<\/strong>&nbsp; If you must have some layout shifting, use CSS transitions to create a smoother animation effect. This helps users anticipate the change and reduces the jarring effect of unexpected shifts.<\/li><li><strong>Leverage the browser&#8217;s back\/forward cache (bfcache):<\/strong>\u00a0 The bfcache can help improve CLS by storing a cache Version of your page, reducing layout shifts when users navigate backward and forward between pages on your site.<\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<p>By following these tips, you can significantly improve your CLS score and create a more user-friendly website.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Cumulative Layout Shift (CLS) is a vital metric in web development that directly impacts user experience, SEO performance, conversion rates, and brand reputation.&nbsp;<\/p>\n\n\n\n<p>By understanding the factors contributing to CLS and implementing effective optimization strategies, developers and designers can create smoother, more stable browsing experiences that delight users and drive business objectives.&nbsp;<\/p>\n\n\n\n<p>Prioritizing CLS optimization is not just about meeting technical requirements; it&#8217;s about delivering a seamless and enjoyable online experience for every visitor.<\/p>\n\n\n\n<p>For reliable and scalable hosting solutions, visit our website, <a href=\"https:\/\/arzhost.com\/\"><strong>ARZ Host<\/strong><\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQS_Frequently_Asked_Questions\"><\/span><strong>FAQS (Frequently Asked Questions)<\/strong><strong><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_What_is_Cumulative_Layout_Shift_CLS\"><\/span><strong>1: What is Cumulative Layout Shift (CLS)?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p><strong>Cumulative Layout Shift<\/strong> (CLS) is a metric used to measure the visual stability of a web page during the loading process. It quantifies the amount of unexpected layout shift that occurs as the page loads. When elements on a webpage unexpectedly move around, users may accidentally click on the wrong elements or lose their place on the page, leading to a <strong><a href=\"https:\/\/arzhost.com\/blogs\/user-experience-optimization\/\">Poor User Experience<\/a><\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_How_is_Cumulative_Layout_Shift_calculated\"><\/span><strong>2: How is Cumulative Layout Shift calculated?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>CLS is calculated by measuring the cumulative impact of all individual layout shift scores that occur during the entire lifespan of the page loading process. A layout shift occurs when a visible element on the page changes its position from one rendered frame to the next.&nbsp;<\/p>\n\n\n\n<p>The score is calculated by multiplying the impact fraction (the proportion of the viewport affected by the shift) by the distance fraction (the maximum distance the element moved relative to the viewport) for each shifting element, and summing these values across all layout shifts.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_What_are_the_causes_of_Cumulative_Layout_Shift\"><\/span><strong>3: What are the causes of Cumulative Layout Shift?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Several factors can contribute to Cumulative Layout Shift, including:<\/p>\n\n\n\n<div id=\"affiliate-style-6c65319e-340e-4ffb-b75e-295ee4e1a679\" class=\"wp-block-affiliate-booster-ab-icon-list affiliate-block-6c6531 affiliate-iconlist-wrapper\"><div class=\"affiliate-iconlist-inner aff-list-isshow-icon\"><div class=\"affiliate-block-advanced-list affiliate-icon-list affiliate-alignment-left\"><ul class=\"affiliate-list affiliate-list-type-unordered affiliate-list-bullet-check-circle\"><li><strong>Images and videos without dimensions:<\/strong> When images or videos are loaded without specifying their dimensions, the browser may reserve space for them, leading to layout shifts when the actual content loads.<\/li><li><strong>Ads, embeds, and iframes:<\/strong> Third-party content like ads or embedded media can cause layout shifts if they load asynchronously or without predefined dimensions.<\/li><li><strong>Dynamic content injection:<\/strong> Content added to the page dynamically after the initial load, such as advertisements or pop-ups, can also cause layout shifts.<\/li><\/ul><\/div><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Why_is_Cumulative_Layout_Shift_important_for_web_performance\"><\/span><strong>4: Why is Cumulative Layout Shift important for web performance?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Cumulative Layout Shift is crucial for user experience and is one of the Core Web Vitals identified by Google. A low CLS score indicates a more stable and predictable browsing experience, leading to higher user satisfaction and engagement.&nbsp;<\/p>\n\n\n\n<p>Pages with high CLS scores may frustrate users, resulting in increased bounce rates and lower conversion rates. Additionally, search engines like <a href=\"https:\/\/developers.google.com\/search\/docs\/appearance\/core-web-vitals\" target=\"_blank\" rel=\"noopener\">Google Consider CLS<\/a> when ranking websites, making it<strong> essential for SEO <\/strong>and overall web performance.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_How_can_Cumulative_Layout_Shift_be_optimized\"><\/span><strong>5: How can Cumulative Layout Shift be optimized?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>To <strong>optimize Cumulative Layout Shift <\/strong>and improve user experience, web developers can take several measures, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Specify dimensions for images and videos:<\/strong> Providing width and height attributes for images and videos allows the browser to allocate space for them, reducing layout shifts.<\/li>\n\n\n\n<li><strong>Reserve space for dynamic content:<\/strong> Pre-allocate space on the page for dynamically loaded content to prevent sudden layout shifts.<\/li>\n\n\n\n<li><strong>Avoid inserting content above existing content:<\/strong> When dynamically adding content to the page, ensure that it doesn&#8217;t push existing content down, causing layout shifts.<\/li>\n\n\n\n<li><strong>Monitor and address third-party content:<\/strong> Keep track of third-party content&#8217;s impact on layout stability and work with providers to minimize layout shifts caused by their content.<\/li>\n\n\n\n<li><strong>Use CSS animations wisely:<\/strong> If using CSS animations, ensure they don&#8217;t cause unexpected layout shifts by reserving space for animated elements or using transforms to animate without affecting layout.<\/li>\n<\/ul>\n\n\n\n<p>By implementing these best practices, developers can <strong>minimize Cumulative Layout Shift <\/strong>and deliver a smoother, more <strong>user-friendly browsing experience.<\/strong><\/p>\n\n\n\n<p><strong>Read More:<\/strong><\/p>\n\n\n<ul class=\"wp-block-latest-posts__list wp-block-latest-posts\"><li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/arzhost.com\/blogs\/how-to-fix-403-forbidden-error-wordpress\/\">How To Fix 403 Forbidden Error WordPress<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/arzhost.com\/blogs\/how-to-get-the-most-out-of-claude-ai\/\">How To Get The Most Out Of Claude Ai<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/arzhost.com\/blogs\/bad-gateway-error-502-the-ultimate-guide-to-quick-fixes\/\">Bad Gateway Error (502): The Ultimate Guide to Quick Fixes<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/arzhost.com\/blogs\/a-deep-dive-into-todays-best-linux-distros\/\">A Deep Dive Into Today\u2019s Best Linux Distros<\/a><\/li>\n<li><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/arzhost.com\/blogs\/domain-investor-terms-powerful-strategy\/\">Domain Investor Terms: Expert Insight on Powerful Strategy<\/a><\/li>\n<\/ul>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview of Cumulative Layout Shift (CLS): How It Works User experience is king in the world of web development. Pursuing more convenient and enjoyable website browsing, developers are always on the lookout for opportunities to enhance elements of site performance.&nbsp; In this light, one of the metrics that has gained especially notable popularity is Cumulative [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":9795,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[],"table_tags":[],"class_list":["post-9788","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/posts\/9788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/comments?post=9788"}],"version-history":[{"count":2,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/posts\/9788\/revisions"}],"predecessor-version":[{"id":11265,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/posts\/9788\/revisions\/11265"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/media\/9795"}],"wp:attachment":[{"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/media?parent=9788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/categories?post=9788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/tags?post=9788"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/arzhost.com\/blogs\/wp-json\/wp\/v2\/table_tags?post=9788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}