Core Web Vitals Explained (Without the Jargon)

Core Web Vitals are Google’s way of measuring real user experience — and they affect rankings. Here’s what they mean in plain English and how to improve them.

Performance metrics dashboard showing Core Web Vitals
Core Web Vitals turn “feels slow” into numbers you can fix.

“Core Web Vitals” sounds like developer jargon, but the idea is simple: Google measures how your pages actually feel to real users, and uses it as a ranking signal. Three metrics do the heavy lifting.

The three metrics

  • LCP (Largest Contentful Paint) — how fast the main content loads. Aim under 2.5s.
  • INP (Interaction to Next Paint) — how quickly the page responds to taps. Faster is better.
  • CLS (Cumulative Layout Shift) — how much the layout jumps around while loading. Lower is better.

Why they matter

Beyond rankings, these metrics map directly to frustration: slow loads, unresponsive buttons, and content that jumps as you try to tap it. Fixing them improves both SEO and real conversions.

Core Web Vitals simply put numbers on what visitors already feel — and reward you for taking it seriously.

How to improve them

Optimise images, reserve space for media to stop layout shift, cut heavy scripts, and host well. Measure with PageSpeed Insights and read Google’s Core Web Vitals reference. We build to these targets — see speed optimization.

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