What is PageSpeed Insights?
Also called: PSI
The short answer
PageSpeed Insights is Google's free tool that shows a page's real-user Core Web Vitals, where available, alongside a Lighthouse lab audit.
PageSpeed Insights, explained
The top section (field data) is what real visitors experienced; the lower section (lab) explains what to fix.
Questions people ask about PageSpeed Insights
What is PageSpeed Insights?
PageSpeed Insights is Google's free tool that shows a page's real-user Core Web Vitals, where available, alongside a Lighthouse lab audit.
Related terms
Lighthouse is Google's open-source auditing tool that scores a page from 0 to 100 on performance, accessibility, best practices and SEO, with specific fixes.
Core Web VitalsCore Web Vitals are Google's three user-experience metrics: Largest Contentful Paint for loading, Interaction to Next Paint for responsiveness and Cumulative Layout Shift for visual stability.
Page speedPage speed is how quickly a web page loads and becomes usable, measured by metrics like Largest Contentful Paint, Interaction to Next Paint and layout stability.
Largest Contentful PaintLargest Contentful Paint measures how long it takes for the largest visible element, usually the hero image or headline, to appear; good is 2.5 seconds or less.
Part of the Web Encyclopedia by Apex Flow Digital. Definitions are general knowledge, kept current, with no invented statistics.