What are Core Web Vitals?
Core Web Vitals are 3 Google metrics measuring the speed, responsiveness, and visual stability of a web page.
The 3 metrics
- ●LCP (Largest Contentful Paint): Loading time of the largest visible element. Target: < 2.5 seconds
- ●INP (Interaction to Next Paint): Responsiveness to user interactions. Target: < 200ms
- ●CLS (Cumulative Layout Shift): Visual stability of the page. Target: < 0.1
How to measure them?
- ●Google PageSpeed Insights
- ●Chrome DevTools (Lighthouse tab)
- ●Google Search Console (Core Web Vitals report)
- ●Web Vitals Chrome extension
SEO Impact
Since 2021, Core Web Vitals are an official Google ranking factor. A fast and stable site will be favored in search results.
Related Terms
What is CLS (Cumulative Layout Shift)?
CLS measures a page's visual stability. A poor CLS means elements move around during loading.
What is LCP (Largest Contentful Paint)?
LCP measures the loading time of the largest visible element on a page. Target: under 2.5 seconds.
What is Page Loading Speed?
Loading speed measures the time needed to fully display a web page. It's a Google ranking factor.
What is Lazy Loading?
Lazy loading is a technique that delays loading images and videos until they're visible on screen.
What is Google Lighthouse?
Lighthouse is a Google tool that audits a web page's performance, accessibility, SEO, and best practices.
What is TBT (Total Blocking Time)?
TBT measures the total time a page is blocked and unresponsive to user interactions.