The Audit tool walks you through how to improve your page step by step.
In this video, we use this tool on the quote generator that I made as a front end development project.
The suggestions you'd get using the Audit tool are generated automatically.
This is important to keep in mind so you can contextualize them with your other knowledge of your site.
Sometimes, it might be right, but sometimes, for your situation it might be wrong.
Use this tool when you want to improve your site or app, but you aren't sure where to start.