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About the PageSpeed Insights API
The PageSpeed Insights API (PSI) reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.
PSI provides both lab and field data about a page. Lab data is useful for debugging performance issues, as it is collected in a controlled environment. However, it may not capture real-world bottlenecks. Field data is useful for capturing true, real-world user experience - but has a more limited set of metrics. See How To Think About Speed Tools for more information on the 2 types of data.
At the top of the report, PSI provides a score which summarizes the page’s performance. This score is determined by running Lighthouse to collect and analyze lab data about the page. A score of 90 or above is considered fast, and 50 to 90 is considered average. Below 50 is considered to be slow.
Real-World Field Data
When PSI is given a URL, it will look it up in the Chrome User Experience Report (CrUX) dataset. If available, PSI reports the First Contentful Paint (FCP) and the First Input Delay (FID) metric data for the origin and potentially the specific page URL.
About Google Pagespeed Insights Checker
Google Pagespeed Insights Checker Tool is an advanced free tool by Eros Soft Solution. Page Speed is among the most important Google ranking factors, and every site owner must focus on improving their site's speed. According to surveys, more than 47% of people expect a web page to load in less than 2 seconds, and 40% leave a web page if it takes more than 3 seconds to load! So it becomes really important for every webmaster to reduce their site's loading time.
Using Google Pagespeed Insights Checker Tool you can easily determine the speed of your website. On entering the site URL into the box, our tool will display the complete Page Speed report of your website. Scores out of 100 will be given to your site, and if your site takes a lot of time to load, our tool will provide some precious suggestions to reduce the loading time.