Performance and UX

PageSpeed Insights

Also known as: PSI

A Google tool analyzing URL performance using lab measurements and available real-user data.

A practical example

A report identifies large images and delayed scripts.

What should I know?

One score cannot describe every device and visit.

Performance and UX in practice

Assess real users' experiences on their devices. Lab tests help identify causes, while user data shows the scale of a problem. A good website also makes information easy to find and tasks easy to complete.

Related Semly features

See where this concept applies when working with Semly.

Google Search ConsoleConnect search data to Semly. Analyze queries and page performance when planning next steps.AI analyticsCompare visibility, position, sentiment, and brand share in AI answers.

Related terms

LighthouseA tool for automated performance, accessibility, and selected website practice audits.CrUXAggregated experience data from eligible Chrome users on real websites.Core Web VitalsUser experience metrics covering main content loading, interaction response, and layout stability.

Documentation and further reading

Definition prepared by Semly. Standards and behavior are described by their creators:

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