First of all, PWA means Progressive Web Apps : These are optimized versions of a mobile site with native application functionality (usually unavailable on a browser).
PWA = best of the new web technologies + best of native applications
PWA’s combine the plurality of possibilities, security and ubiquity on all devices and Information Systems by Web ; and the autonomy, reliability and ubiquity on home screens, docks and task bars offered by native applications.
A PWA is consulted like a classic website, from a secure URL, but allows a user experience similar to that of a mobile application, without the constraints of the latter (submission to App-Stores, significant use of the device's memory, etc..)
