In plain English
Think of walking into a shop. Is the lights-on moment quick? When you ask a question, does someone answer, or stare? And do the shelves stay put, or slide while you're reaching for something? Core Web Vitals score a page on exactly those three.
Used in a sentence
“All three Core Web Vitals pass on phones now, so the site loads and responds the way Google wants.”
“Search Console flagged our Core Web Vitals, and it turned out our homepage video was the problem.”
In detail
The three measures are Largest Contentful Paint (how soon the biggest thing on screen appears), Interaction to Next Paint (how quickly the page responds when someone taps or types) and Cumulative Layout Shift (how much the layout jumps while loading). Google rates each as good, needs improvement or poor, based on real visits from Chrome users.
You can see your scores in Search Console and in PageSpeed Insights. Heavy images, slow hosting, too many plugins and third-party scripts are the usual culprits. Fixing them is mostly technical work, but the payoff is plain: pages that feel quick and steady keep more of the visitors they get.
Why it matters for your business
They're part of how Google judges your pages, and they reflect what your customers feel on a phone.
- A small part of how Google ranks pages
- Fewer visitors giving up on slow pages
- A clear list of what to fix first
Easy to mix up
A good PageSpeed score in a test isn't the same as passing Core Web Vitals. The pass is based on real visitors over time; the test is a single simulated load. Our post Is your website too slow? goes further
Related terms
Search Console, Hosting and Mobile-first. Or browse the whole glossary.
