Core Web Vitals

DefinitionCore Web Vitals are Google's three user-experience metrics for loading (LCP), responsiveness (INP) and visual stability (CLS), measured on real visits.

Google assesses each metric at the 75th percentile of page loads from real Chrome users, separately for mobile and desktop. Good thresholds are LCP up to 2.5 seconds, INP up to 200 milliseconds and CLS up to 0.1. They are part of page experience, which Google's ranking systems consider, but good scores alone don't make a page rank.

AI Rank Lab's Core Web Vitals module scans the pages it has discovered for your domain on mobile and desktop, now or on a schedule, and shows a filmstrip and layout shifts. See Monitor Core Web Vitals.

Learn it step by step

• Monitor Core Web Vitals (SEO audits)

Related terms

• LCP (Largest Contentful Paint): LCP measures how long it takes for the largest image or text block in the viewport to appear. Good is 2.5 seconds or less.
• INP (Interaction to Next Paint): INP measures how quickly a page responds visually to clicks, taps and key presses across a visit. Good is 200 milliseconds or less.
• CLS (Cumulative Layout Shift): CLS measures how much visible content unexpectedly moves while a page is in use. Good is 0.1 or less.
• SEO (search engine optimization): SEO is the work of helping search engines crawl, understand and rank your pages so that people searching for what you offer find and click them.