A set of three Google metrics measuring real-world page experience: Largest Contentful Paint (loading speed), Interaction to Next Paint (responsiveness), and Cumulative Layout Shift (visual stability). Core Web Vitals are a confirmed Google ranking factor, and — because slow or janky pages get abandoned before an AI crawler or reader finishes loading them — they matter for AI visibility too. Sites are scored per-URL and per-device, meaning a fast desktop page can still fail on mobile. See Core Web Vitals explained and designing a Core Web Vitals experiment.
Part of the Plain Intelligence glossary. See all terms.