What is Core Web Vitals?
A set of three user-centric performance metrics defined by Google that measure real-world page experience: Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness), and Cumulative Layout Shift (visual stability). Since 2021, Core Web Vitals are a confirmed Google ranking signal.
My perspective
In practice
Measured in the field via Chrome User Experience Report (CrUX) data, not just lab tools. The three thresholds to hit: LCP ≤ 2.5s, INP ≤ 200ms, CLS ≤ 0.1. Improving them requires a blend of front-end engineering, image optimization, and server-side performance, making them a natural bridge between SEO strategy and technical execution.