Cumulative Layout Shift: Importance

Jumpy websites that load in pieces or with unexpected behavior will cause your visitors to find another website to browse. And if they do stick around, a high CLS score is likely to cause usability problems like choosing the wrong option, checking out too early, or missing parts of your website altogether.

This problem is only exacerbated by the large number of internet users who are browsing on their smartphones. When viewing your site on a small screen, any jumps and layout shifts on the website are certain to have a big impact on mobile user experience.