Core Web Vitals

Core Web Vitals are Google's three measurements of real-world page experience: loading speed (LCP), responsiveness to input (INP), and visual stability (CLS). They're a ranking signal, so they affect both how a site feels and how it's found.

Core Web Vitals are Google’s three specific measurements of how a page feels to a real visitor. LCP (Largest Contentful Paint) measures how quickly the main content loads. INP (Interaction to Next Paint) measures how fast the page responds when you tap or click. CLS (Cumulative Layout Shift) measures whether things jump around as the page settles. Together they put numbers on “does this site feel fast and stable.”

They matter twice over. Visitors feel them directly — a slow, jumpy page loses people before they read anything — and Google uses them as a ranking signal, so poor scores quietly cost you visibility too. The good news is that the same choices that fix them (lean pages, right-sized images, reserved space for media) are just good engineering.

A static, well-built site tends to pass them by default. See the approach in clean, fast, found.

Quick recall

What are Core Web Vitals? Google’s three page-experience metrics: LCP (load), INP (responsiveness), and CLS (stability).

Why do they matter? Visitors feel them directly, and they’re a Google ranking signal.

How do you pass them? Lean pages, right-sized images, and reserving space so nothing jumps — plain good engineering.