Core Web Vitals
Core Web Vitals are Google's three user-experience metrics — loading speed, interaction responsiveness, and visual stability — used as a ranking signal.
Definition
The three metrics are Largest Contentful Paint (how fast the main content appears), Interaction to Next Paint (how fast the page responds to clicks and taps), and Cumulative Layout Shift (how much the page jumps around as it loads). Each has a threshold for 'good,' 'needs improvement,' and 'poor.'
Why it matters for your business
A slow site loses revenue twice: visitors leave before the page loads, and Google ranks the page lower so fewer visitors arrive in the first place. The effect compounds on mobile, where most buying journeys now start. Web Vitals are a proxy for whether your site respects the visitor's time.
How we apply it
We treat Web Vitals as a launch requirement, not a post-launch fix. Every page we build hits 'good' on all three metrics on a mid-range Android phone over 4G before it goes live. We measure with real-user data, not lab tests alone.
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