Core Web Vitals Explained (and How to Pass Them in 2026)

Core Web Vitals — LCP, INP, and CLS — are a Google ranking factor. Here's what each one means, the thresholds to hit, and how to pass them.

Core Web Vitals are Google's three metrics for real-world page experience, and they're a confirmed (if modest) ranking factor. More importantly, passing them means a faster, smoother site that converts better.

The three metrics

• LCP (Largest Contentful Paint) — how fast the main content loads. Aim for under 2.5s.
• INP (Interaction to Next Paint) — how quickly the page responds to taps/clicks. Aim for under 200ms. (INP replaced FID in 2024.)
• CLS (Cumulative Layout Shift) — how much the layout jumps as it loads. Aim for under 0.1.

How to pass them

• LCP: compress the hero image, preload it, use a CDN, and cut render-blocking CSS/JS.
• INP: break up long JavaScript tasks, defer non-critical scripts, and avoid heavy third-party widgets.
• CLS: set width/height on images and reserve space for ads/embeds so nothing shifts.

Measure first

Check a page instantly with the free Audit SEO tool (it flags speed and layout issues), then track Core Web Vitals across your whole site over time with Semrush or SE Ranking.

A faster site = a better score

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