What it is
Cumulative Layout Shift measures how much the page jumps around as it loads. Above 0.1 the experience feels unstable, and the usual culprits are images and ads without reserved space. Cumulative Layout Shift above ‘good’. Visual instability harms UX; part of page experience.
Why does cls > 0.1 matter for AI search?
Visual instability harms UX; part of page experience.
How do you fix it?
Reserve space for media/ads; set dimensions.
How do you find it on your site?
- Read CLS in PageSpeed Insights field data and the Search Console Core Web Vitals report.
- Watch the page load and note anything that shifts: images, ads, banners, late-loading fonts.
- Set explicit width and height, or aspect-ratio, on media so space is reserved.
- Reserve space for any dynamically injected element.
Which ranking and citation factors does it touch?
CLS is a Core Web Vital and a direct user-experience signal. A jumpy layout also causes misclicks, which hurts engagement.
What is the impact?
Low-medium. Direct.
What is the evidence?
CLS ‘good’ < 0.1. web.dev, Core Web Vitals (Google); Google Search Central, Understanding page experience in Google Search results
Sources
Frequently asked questions about cls > 0.1
What does "CLS > 0.1" mean?
Cumulative Layout Shift above ‘good’.
How do you fix cLS > 0.1?
Reserve space for media/ads; set dimensions.