How to Fix CLS in WordPress
Cumulative Layout Shift improves when the browser knows how much space content will occupy before late-loading assets arrive.
Reserve dimensions
Images, video, embeds and ad slots should have explicit dimensions or aspect-ratio space so surrounding content does not jump when they load.
Watch injected UI
Cookie banners, announcement bars, personalization and late-loaded forms can push visible content after the page has begun rendering.
Fonts can shift text
Fallback and web fonts can have different metrics. Choose sensible fallbacks, preload only truly critical fonts and avoid excessive font variants.
Animations versus shifts
Movement caused by user interaction is treated differently from unexpected layout changes. Diagnose the actual shift source in browser tooling.
Theme fixes beat plugin patches
When a theme component repeatedly causes instability, correct its layout behavior at the source rather than stacking performance plugins around it.