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Cumulative Layout Shift (CLS)

Cumulative Layout Shift measures the visual stability of a webpage by tracking unexpected layout movements during the page loading process, calculated as the sum of all individual layout shift scores.

Why Cumulative Layout Shift (CLS) Matters

CLS is a Core Web Vital that affects user experience and SEO. Unexpected layout shifts frustrate users and can cause accidental clicks, with scores above 0.1 considered poor and requiring optimization.

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