Google PageSpeed Insights (PSI) is a free tool by Google that analyzes the performance of a webpage on both mobile and desktop devices. It provides:

  • A performance score (0–100) based on speed and Core Web Vitals.
  • Detailed reports on loading, interactivity, and visual stability.
  • Suggestions for optimization, such as image compression, code minification, caching, and server improvements.

It helps developers and website owners enhance user experience, SEO rankings, and overall site performance.