PageSpeed Insights.
PageSpeed Insights : - Google has announced that PageSpeed Insights will publish all available field data. PageSpeed Insights and API updated to show more field data than ever before. Updated PageSpeed Insights scoring is live and reflects a new way of handling field data. PageSpeed Insights displays field data if all field data is collected. Field data in PageSpeed Insights: Field data is the actual user page speed metrics collected by Google through selected Chrome mobile browsers that send anonymous performance information from the site visitor's actual experience on the webpage, which is used to calculate page speed metrics. Lab data is used at Google Lighthouse, a tool used to estimate page speed scores. Lighthouse is shipped in the Chrome browser and powered by dev tools. Right-clicking anywhere on a web page opens Chrome Dev Tools and from there you can use Lighthouse to simulate what PageSpeed metrics are. The actual data used by Google for ranking purposes i...