Page speed and Core Web Vitals

Page speed is how quickly a page shows its main content and responds. Google measures it with Core Web Vitals: Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift.

Why it matters

Slow pages lose visitors before they read a word, and speed is part of how Google ranks pages. Google's targets are LCP within 2.5 seconds, INP within 200 milliseconds and CLS under 0.1.

In practice

  • Test on a mid-range phone, not your laptop.
  • Compress images and load only the fonts you use.
  • Keep scripts off pages that don't need them.

Website designAll 42 terms

Related terms

Content management system

A CMS is the software your team uses to edit the website without code, such as WordPress or Webflow.

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Design system

A design system is the shared set of colours, type, spacing and components a site is built from, written down so anyone can reuse it.

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Positioning

Positioning is the short, specific answer to who you're for, what you do for them, and why you instead of the alternatives.

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Want this done for you?

Page speed and Core Web Vitals is part of a normal project here. Tell me where you are and I'll suggest the first three fixes.

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