What are Core Web Vitals?
Google's metrics for measuring page loading, interactivity, and visual stability.
Understanding Core Web Vitals
Core Web Vitals are a set of metrics Google uses to measure user experience quality on web pages. The three current metrics are LCP (Largest Contentful Paint - loading performance), FID/INP (First Input Delay/Interaction to Next Paint - interactivity), and CLS (Cumulative Layout Shift - visual stability).
Core Web Vitals are official Google ranking factors, meaning poor scores can hurt your search visibility. They're measured using real user data from Chrome browsers. Good scores: LCP under 2.5 seconds, FID under 100ms (or INP under 200ms), CLS under 0.1. Improve Core Web Vitals through image optimization, code minification, server response time reduction, proper size attributes on images and embeds, and careful use of dynamic content.
Frequently Asked Questions
What are Core Web Vitals?
Google's metrics for measuring page loading, interactivity, and visual stability.
Core Web Vitals are a set of metrics Google uses to measure user experience quality on web pages. The three current metrics are LCP (Largest Contentful Paint - loading performance), FID/INP (First Input Delay/Interaction to Next Paint - interactivity), and CLS (Cumulative Layout Shift - visual stability).
Why is Core Web Vitals important?
Core Web Vitals directly impact Google rankings and user experience—slow, janky websites rank worse and convert worse. Sites that pass Core Web Vitals thresholds see 24% lower abandonment rates on average. This is one of the few SEO factors where technical improvements immediately impact both rankings AND conversion rates, making it a high-leverage optimization area.