What are Core Web Vitals?
Core Web Vitals are Google's three key measures of a page's real-world loading, responsiveness and visual stability.
Definition
They are Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness) and Cumulative Layout Shift (stability), measured from real visits.
Why it matters
They reflect the experience of actual visitors and are part of how Google evaluates pages.
How to get it right
- Aim for LCP under 2.5 seconds.
- Keep INP under 200 milliseconds.
- Keep CLS under 0.1.
- Measure with real-user data, not only lab tests.
Mistakes to avoid
- Huge unoptimised images
- Heavy JavaScript
- Content that jumps as it loads
Related terms
- Largest Contentful Paint (LCP)Largest Contentful Paint is the time it takes for the biggest piece of content in the first screen to appear.
- Cumulative Layout Shift (CLS)Cumulative Layout Shift measures how much a page's content unexpectedly moves while it loads.
- CDNA CDN, or content delivery network, serves a website's files from servers close to each visitor.
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What are Core Web Vitals?
Core Web Vitals are Google's three key measures of a page's real-world loading, responsiveness and visual stability. They are Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness) and Cumulative Layout Shift (stability), measured from real visits.
Why does Core Web Vitals matter?
They reflect the experience of actual visitors and are part of how Google evaluates pages.
How do you get core web vitals right?
Aim for LCP under 2.5 seconds. Keep INP under 200 milliseconds. Keep CLS under 0.1. Measure with real-user data, not only lab tests.
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