Introduction to Service Worker - Progressive Web App Training
Channel: Chrome for Developers
Date: 08/04/2019

Service workers are at the core of PWA techniques for resource-caching and push notifications. 

This video shows you what a Service Worker is, what it can do, and explains the Service Worker lifecycle in the browser.

Full playlist:
https://www.youtube.com/playlist?list=PLNYkxOF6rcIB2xHBZ7opgc2Mv009X87Hh