How to Improve Website Speed: Core Web Vitals Explained Simply

Speed affects how people experience your site — and slow pages lose visitors. Google measures real-user experience with Core Web Vitals.

The three metrics

• LCP (Largest Contentful Paint) — how quickly the main content appears. Good: within 2.5 seconds.
• INP (Interaction to Next Paint) — how quickly the page responds when someone taps or clicks. Good: 200 ms or less.
• CLS (Cumulative Layout Shift) — how much the layout jumps around while loading. Good: 0.1 or less.

Fix the usual suspects

Images

Serve modern formats (WebP/AVIF), size images to their display size, lazy-load below-the-fold images and always set width and height to prevent layout shift.

Fonts

Use one or two font families, self-host them, and use font-display: swap.

JavaScript

Remove unused plugins and third-party scripts. Load analytics and chat widgets after the page is interactive. Every script has a cost.

Hosting and caching

Use page caching, a CDN, and a host with servers near your audience. Upgrade hosting if your server response time is consistently slow.

Measure, then improve

Test key pages with PageSpeed Insights, check the Core Web Vitals report in Google Search Console, and re-test after each change. Our free Website Audit can pull PageSpeed data for a URL when configured.

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