Core Web Vitals · LCP, INP, CLS
Core Web Vitals are three indicators Google measures on your real visitors: LCP (how fast the main content shows, threshold 2.5s), INP (responsiveness to interactions, threshold 200ms) and CLS (visual stability, threshold 0.1). They count in rankings and, above all, in conversion.
A concrete example
Example
A page whose LCP drops from 4s to 2s does not just gain an SEO signal: it keeps mobile visitors who would have left before ever seeing your offer.
Why it matters
Most local searches happen on mobile, often in situation. Every second of loading loses visitors you paid for by the click or earned the hard way in rankings. Core Web Vitals are the official measurement of that friction.
Frequently asked questions
- Field data or lab data?
- Field data (your real visitors, via the CrUX report) is what counts for Google. Lab measurements are for diagnosis. A site can have a poor lab score and good field data, and vice versa: judge on the field.
- Which fixes pay the most?
- Almost always the same ones: oversized images (compression, modern formats), third-party scripts that block rendering, missing caching, and poorly loaded fonts. Our test lists your page's opportunities with the estimated gain of each.