https://developers.google.com/speed/pagespeed/insights/   If you want to make your webpages fast on all devices, you definitely need to get PageSpeed Insights. You have an opportunity to learn more about web performance tools at Google and these include browser extensions, APIs for insights, the PageSpeed service and the optimization libraries from Google. PageSpeed Insights analyzes the content of a web page and generates suggestions to make the page faster.     Rank Tracking