What is a Progressive Web App (PWA)?
Progressive Web Apps [*] are Web Apps that behave more like native apps. You can “install” them to give them a dedicated window and shortcut on your PC. They can also load quickly, and show you notifications—just like normal apps.
They are the future of software because they work everywhere, they are safe and they install and update almost instantly.
Examples and success stories using PWA Web Apps
How to Install your Web App on Windows, Mac or Linux
On desktops and laptops, as of early 2020, you need Google Chrome.
How to install?
That is it. Nothing special about it. As mentioned, because there is no download or software to actually install, installation itself is almost instant. This is normal.
How to Install your Web App on Apple iPhone and Android Phones