What is CLS
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Lighthouse: Cumulative Layout Shift
Overview
Cumulative Layout Shift (CLS) is a performance metric introduced in 2020 by Lighthouse to measure the perceived visual stability of a page load.
Simply put, CLS measures the unexpected shifting of web elements while the page is being rendered. This measurement is then quantified as an aggregate score of all the individual layout shifts on your page
Yash Patel
WordPress Developer