What's in the Google PageSpeed score

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PageSpeed Metrics

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2026-10-10

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1. ▲
   About PageSpeed Insights developers.google.com

   site category #pagespeed-metrics link ↗
   
2. ▲
   How Google Pagespeed works calibreapp.com

   site category #pagespeed-metrics link ↗
   
3. ▲
   PageSpeed Insights Rules developers.google.com

   site category #wpo link ↗

   A guide created by PageSpeed Team. Deprecated. This is deprecated and will be shut down in May 2019. Version 5 is the latest and provides both real-world data from the Chrome User Experience Report and lab data from Lighthouse.

   
4. ▲
   Lighthouse developers.google.com

   site category #pagespeed-metrics link ↗
5. ▲
   PageSpeed Insights developers.google.com

   site category #critical-path-css-tools link ↗

   Page Speed Insights measures the performance of a page for mobile devices and desktop devices.

6. ▲
   Docs - User-centric Performance Metrics - web.dev web.dev

   site category #pagespeed-metrics link ↗