This document provides an overview of progressive web apps (PWAs) through a presentation given by Frances. The presentation covers why PWAs are useful, examples of PWAs in practice, and how to build a PWA. It explains that PWAs are fast, work on any network, can be installed like native apps, and use newer web capabilities like push notifications. The bulk of the presentation focuses on the technical aspects of developing PWAs, including using a service worker, manifest file, and other techniques to make web apps more app-like.