Сumulative layout shift

In the ever-evolving world of web performance, user experience is more important than ever. Google’s Core Web Vitals are a crucial factor in determining how well a website performs in terms of Google Page Experience core web vitals. Among the key metrics that Google uses to measure UX, Cumulative Layout Shift stands out as a critical one. This metric evaluates how stable your page layout is, ensuring users aren’t frustrated by unexpected movements during page load.

If you want your site to rank higher and offer an exceptional experience, understanding what is a CLS, how to test it, and how to improve it is vital. This cumulative layout shift guide will take you through everything you need to know about CLS and how to optimize it to ensure better user satisfaction and SEO results.

What is Cumulative Layout Shift?

Cumulative Layout Shift is a metric that measures the cumulative score of unexpected shifts in the layout of a webpage while it's loading. Essentially, if the content on your webpage moves unexpectedly after the page starts to load (like images or buttons shifting positions), it causes a poor experience for the user, leading to CLS.

Why is CLS Important?

Google Ranking Factor: CLS is one of the key elements in the Core Web Vitals, which are used by Google to assess the Google Page Experience core web vitals. A poor CLS can harm your rankings.