Core Web Vitals
Core Web Vitals are three measurements Google uses to judge real users' page experience: how fast the main content loads (LCP), how quickly the page responds to taps and clicks (INP), and how much the layout jumps around while loading (CLS). They affect user experience and are part of Google's ranking signals.
Key Facts
| LCP (loading) | Good at 2.5 seconds or less |
|---|---|
| INP (responsiveness) | Good at 200 milliseconds or less |
| CLS (visual stability) | Good at 0.1 or less |
| Measured on | Real Chrome users over 28 days, shown in Search Console and PageSpeed Insights |
What usually hurts scores
- Large, unoptimised images and heavy fonts (LCP).
- Too much JavaScript, chat widgets and trackers (INP).
- Images and ads without reserved space (CLS).
Where to check
Search Console's Core Web Vitals report shows real-user data by page group; PageSpeed Insights diagnoses individual pages. See Core Web Vitals explained for business owners.
Frequently Asked Questions
Do Core Web Vitals decide rankings?
They are one of many signals. Relevant, helpful content matters more, but poor experience can hold a page back.
Why do lab and real-user scores differ?
Lab tests use one device and connection; real-user data reflects your actual visitors, often on slower phones and networks.
Related Glossary
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