CGlossary
CLS
Cumulative Layout Shift
CLS is a Core Web Vitals metric from Google that measures the visual stability of a page. A good score is below 0.1. Elements that shift after loading (images without dimensions, dynamic content, fonts without font-display: swap) increase CLS and hurt SEO rankings.
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WCAG 2.1/2.2 AA
EAA 2025 Ready
ДСТУ EN 301 549