Legendary SEO audit tool Google Insights is now changed to Pagespeed, Google page speed test is one of the authentic SEO audit tools by Google. This page speed module also called MOD_PageSpeed is an open-source server-level package that helps to optimize your website, for on-page optimization Google insights help us a lot for more than 7 years now, On this Page, speed is checked two times, one with mobile user-agent and desktop-user agents. This score is starting from 0 to 100 points. A score of 85 and above indicates the page is performing well. PageSpeed insights affect SEO. Speed is affecting the ranking through the bounce rate and decreasing the dwell time.
Check your website performance - Google page speed test at Pagespeed - Google Insights