The Full Form of PWA is Progressive web app.

Here’s the quick summary: Google, Microsoft, Mozilla and other companies are working on a new, modern web application standard. Even Apple is following along and implementing support for it. These applications are web apps, but they behave more like native apps. Like existing web apps, they’ll be hosted directly on their associated website. Developers can update them directly on their web server without submitting those updates to several different app stores, and the same app will run on all browsers and platforms.

When you install a progressive web app, you’ll get a home screen, taskbar, or desktop shortcut that launches the app (depending on your platform). The app will load quickly and will include offline support, push notifications, background syncing support, and other modern goodies.

These apps can also use existing web technologies to access location services, your webcam, and other such features we’d normally associate with native apps. Of course, apps have to ask you and get your permission before accessing these things.