Core Web Vitals

Largest Contentful Paint (LCP) is the time until the biggest image or block of text appears; good is 2.5 seconds or less. Interaction to Next Paint (INP), which replaced First Input Delay in 2024, measures how long the page takes to respond visibly to taps, clicks and key presses; good is 200 milliseconds or less. Cumulative Layout Shift (CLS) scores how much content moves unexpectedly as the page loads; good is 0.1 or less.

A page passes when at least 75 per cent of real visits meet all three targets, measured from Chrome users over the previous 28 days in the Chrome UX Report. That field data appears in Search Console and PageSpeed Insights, while lab tools such as Lighthouse simulate one load to help diagnose problems. The scores feed Google's page experience signals, which weigh less than relevance, but slow, jumpy pages lose visitors either way.