A measurement of visual stability.
NOIR & BLANCO COMMUNITY
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: Cumulative Layout Shift (CLS) is a Core Web Vital that measures the visual stability of a webpage by tracking unexpected layout shifts while the page loads. A low CLS score means page elements remain stable, providing a better user experience. On Shopify stores, reducing CLS by reserving space for images, ads, and dynamic content helps improve usability, SEO performance, and customer satisfaction.