What is the "CLS needs improvement" check?

P2 · MediumPerformance

CLS needs improvement

CLS between 0.1-0.25

Code: needs_improvement_cls

CLS between 0.1-0.25. Slow experiences increase bounce rates and hurt Core Web Vitals scores. Google uses these metrics as a direct ranking signal.

FCP exceeds 3 seconds

FCP between 1.8-3 seconds

LCP exceeds 4 seconds

LCP between 2.5-4 seconds

CLS exceeds 0.25

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