What Is CLS? How (and Why) to Measure It

CLS (Cumulative Layout Shift) measures how much the layout shifts unexpectedly when users are viewing your webpage. Defining Good or Poor CLSGoogle officially defines CLS scores within the following ranges:“Good” CLS: Below 0.10“Needs Improvement” CLS: Between 0.10 and 0.25“Poor” CLS: Above 0.25How to Check Google CLSThere are many ways to check your CLS. Once the crawl is complete, navigate to “Core Web Vitals” and click “View details.”This will open the Core Web Vitals performance report for your website. You have a real CLS problem only if all elements combined contribute to a Google CLS score of anything more than 0.10. Here are some tips to get you started:Monitor CLS with SemrushSemrush’s Site Audit tool allows you to track your performance for Google CLS.