Page speed (A-cls)
Cumulative Layout Shift (mobile lab)
This page explains what this scan check measures. It is not legal advice or a compliance verdict.
What this check is
Cumulative Layout Shift (CLS) measures unexpected layout movement during a mobile lab load.
Why WordPress sites show it
WordPress pages often shift when ads, cookie banners, webfonts, or late-loading images reserve no space.
Realistic impact
High CLS is unstable layout in the lab. It frustrates reading and tapping; it is not a privacy or legal verdict.
How to verify a fix
A re-scan after reserving image space and stabilizing banner placement shows whether mobile CLS improved.
Open the step-by-step fix guideSee this check on your site
Run a free scan. If this check appears in your report, you will see the live status for your URL.
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