Building progressive web apps become the norm of web development these days! In fact, we are being introduced to more complex patterns and strategies to create a PWA. For example, When I build my book's website pwawithangular.com, I considered several caching strategies and patterns to deliver fully offline and high-performance web applications that can load under 2 seconds with 3G internet. In this talk, I will share how I could manage to build a fast and reliable PWA by using different caching strategies, advanced PWA architecture, and patterns.