Today, we will go over GTmetrix, the speed test tool. GTmetrix is a web-based tool that provides an analysis of website speed. How To Use GTmetrixThe GTmetrix tool exists on a website that you can access online. History TabHere you can view graphs that display changes over time to your page metrics like page sizes, time to interact, and scores. Performance ScoreThe performance score, as stated on the GTmetrix website, can be compared to a Lighthouse Performance Score.