Google is known for providing various performance optimization tools and there’s no doubt that PageSpeed Insights by Google is one of the globally used page speed measurement tools, and for all good reasons as it provides great insights to the website developers to further optimize website for better performance.

Google’s PageSpeed Insights (PSI) measures the performance of a webpage on mobile and desktop devices, and then provide various suggestions to improve that page. It provides many type of data after scanning for developers:

  1. Speed Score: It tells you how good your webpage is optimized as per all Google’s indicators and what is the overall score of your webpage according to Google’s score metrics.
  2. Lab datais collected in a controlled environment, that is with a set of predefined devices and network settings. It is effective for debugging performance issues, and its testing can be easily reproduced.
  3. Field data(also called Real User Monitoring or RUM) includes performance data coming from real page loads. It’s effective to capture true, real-world user experience, but the set of metrics is limited as well as its debugging potential.
  4. Opportunities includes recommendations about performance metrics that could improve page loading time. Each recommendation includes an estimation of the load time the page could save if the suggestions were implemented.
  5. Passed Audits This tells you how much your website is already optimized from performance prospective and doesn’t require further optimization or developer’s intervention.

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