What is page speed insights - chrome extension
PageSpeed Insights (PSI) evaluates the user experience of a webpage on both mobile and desktop devices, offering recommendations for its enhancement.
How do page speed insights work
Lab data is valuable for troubleshooting problems since it's gathered in a controlled environment.
However, it may not fully capture real-world performance issues.
On the other hand, field data is more adept at reflecting the actual user experience in real-world scenarios, though it provides a narrower range of metrics.
To get started, go to https://pagespeed.web.dev/ and enter the URL of the page you want to test, and click Analyze.
After a few seconds, Lighthouse audits will be performed and you will see sections with data from CrUX ("Discover what your real users are experiencing") and Lighthouse ("Diagnose performance issues")