Google PageSpeed Insights (PSI) is a free tool developed by Google that analyzes the performance of your web pages on both mobile and desktop devices. It provides a score from 0 to 100, along with practical suggestions to improve your site's speed and user experience. A higher score indicates better performance.

The tool evaluates your page using data from the Chrome User Experience Report (CrUX) and a Lighthouse lab simulation. It generates two sets of results:

• Field Data: Real-world performance data from actual users over the last 28 days.
• Lab Data: A simulated load of your page under controlled conditions, diagnosing specific issues.

Key metrics it focuses on include:

• Largest Contentful Paint (LCP): Measures loading performance. Aim for < 2.5 seconds.
• Cumulative Layout Shift (CLS): Measures visual stability. Aim for < 0.1.
• First Input Delay (FID): Measures interactivity. Aim for < 100 milliseconds.

Why is this important? Page speed directly impacts user engagement, conversion rates, and SEO rankings. Google uses page experience as a ranking factor. By regularly checking your PSI report and implementing its recommendations—such as optimizing images, minifying CSS/JavaScript, and leveraging browser caching—you can create a faster, more efficient website that keeps visitors happy and improves your search visibility.