A progressive web app is a way to bring a native app experience into the browser, therefore the idea is to have a progressive enhancement of your app but during our development process, we have to keep in mind a few factors in order to make it. During this talk, we are going to discuss how to read and test our PWA performance, check some metrics that are useful to keep in mind like Cumulative Layout Shift and which are the tools that can help us to deliver web apps that are fast and progressive (for real!).