Core Web Vitals — core performance indicators
Google's three key page experience metrics: LCP (load speed), INP (interactivity), and CLS (visual stability). Official Google ranking signal since 2021 and the central technical SEO performance measure.
CWV
Google's three key page experience metrics: LCP (load speed), INP (interactivity), and CLS (visual stability). Official Google ranking signal since 2021 and the central technical SEO performance measure.
Derivatives & related terms
- LCP (Largest Contentful Paint)
- INP (Interaction to Next Paint)
- CLS (Cumulative Layout Shift)
- FID — out of date
- FCP (First Contentful Paint)
- TTFB (Time to First Byte)
- TBT (Total Blocking Time)
- Speed Index
- PageSpeed Insights
- Lighthouse score
- CRUX data
- Lab data vs. field data
SEO tip
Passing all three thresholds — LCP <2.5 s, INP <200 ms, CLS <0.1 — results in a rating of “Good” and a page experience signal advantage in competitive SERPs.
Source: Georgia Business & Technology Glossary by Del-Ops Technology & Consulting Team. Last Updated: February 2026.