True or false? Cumulative Layout Shift is only measured on a page's first load.
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Correct answer: False.
Why this is the answer
Cumulative Layout Shift (CLS) measures all unexpected layout shifts that occur throughout the entire lifespan of a page, not just the first load. It captures shifts caused by images, ads, or dynamic content appearing after initial rendering. Monitoring CLS ensures visual stability and enhances user experience, which is a key Page Experience signal. Reducing CLS improves usability and SEO performance.
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