Progressive Web Apps are the simplest way to provide an app-like experience to your website. Whether you have a brochureware site, content-driven blog, or an actual web app, enhancing your site with a PWA is a win-win.

This session will highlight the work done in one module: https://drupal.org/project/pwa

Designed to work out of the box, the module can add basic PWA functionality to your site without requiring any understanding of the underlying technologies (Service Worker and the manifest file). For more advanced JavaScript developers there are unlimited ways to customize the experience by writing your own Service Worker. But for people seeking basic offline functionality this is exactly what you need without adding too much complexity to your site.