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GPT-guides-minimize-layout-shift Ad Manager docs

Unexpected layout shifts caused by ads negatively impact user experience and usability. Layout shifts primarily occur when ads are fetched and rendered, potentially displacing existing content. Cumulative Layout Shift (CLS) is a metric used to measure these shifts, with a recommended score below 0.1. Minimizing layout shifts involves reserving space for ad slots using CSS, particularly min-height and min-width. Fluid ad slots inherently cause layout shifts and are best placed below the fold or fetched early to reduce impact. A layout shift occurs when a visible element on your page changes pos

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