Brave standalone apps?

If I go to coinmarketcap I get a little plus on the right side of the address bar that lets me add coinmarketcap as an app. It launches in its own window and has it’s own icon and everything. I checked and it’s running as a Brave process. The little plus doesn’t show up on Google Chrome, but I also can’t find this feature listed on the Brave website. I can’t find anything about it on Chromium either (although admittedly I find their website a little difficult to navigate). So what is this?

@Mason I believe you talked about PWA (progressive web app). More or less