Suggest an editImprove this articleRefine the answer for “What is CLS (Cumulative Layout Shift)?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**CLS (Cumulative Layout Shift)** is a metric that measures **how much and how unpredictably page elements shift** during loading. **Key point:** CLS does not depend on loading time, it is a matter of layout stability, not speed.Shown above the full answer for quick recall.Answer (EN)Image**CLS (Cumulative Layout Shift)** is a metric that measures **how much and how unpredictably page elements shift** during loading. --- ### What it looks like: - you are reading text, and suddenly everything jumps down because an ad loaded; - you want to tap a button, but at the last moment it moved, and you tapped the wrong thing. --- ### Why it is bad: Shifts interfere with interaction, annoy users, and lead to mistaken actions. Especially on mobile. --- ### Good scores: - **up to 0.1** is considered normal; - **0.1-0.25** needs attention; - **more than 0.25** is a poor user experience. --- CLS does not depend on loading time. It is a matter of **layout stability**, not speed. The fewer the jumps, the better the perception of the site and the higher user loyalty.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.