Core Web Vitals sound technical, but they measure something very concrete: whether your page feels fast and stable to an actual visitor.
This measures how quickly the largest, most meaningful piece of content on a page becomes visible — a slow score here means visitors are staring at a blank or incomplete screen longer than they should.
This measures the delay between a visitor clicking or tapping something and the page actually responding — a poor score here feels like an unresponsive, laggy site, even if it looked fully loaded.
This measures unexpected layout shifts as a page loads — the frustrating experience of a button moving right as you go to tap it, often caused by images or ads loading without reserved space.
These aren't just abstract scores — they measure real, felt experience. A visitor doesn't need to know what "Core Web Vitals" means to feel a slow, jumpy, unresponsive page, and to leave because of it.
Find out how your site actually performs.
Run a free audit →