Bottles is essentially a frontend for Wine, it lets you put every single app to its own WINEPREFIX, so that each one can have their own settings, C: drive, etc.
If you've heard of Lutris, Bottles is essentially the same thing, but aimed at general software instead of only focusing on games
Well, things have to be named something. At least "Bottles" are related to "Wine" in a way that makes sense for a name for isolated Wine environments. It is also unique enough that Google will give you the answer quickly.
These have been around since I last used WINE in anger on macOS. Basically think of it as a container for running an app in WINE with all the settings predefined for best compatibility. The homepage doesn’t really highlight this but you can look through the docs for more information.
I used it a decade ago and it was handy at the time. I’d hope it got better over time. Generally I know enough about how Windows works I didn’t have much trouble using normal Wine installations of software but the bottles did make some Adobe products easier to use.
It was funny being able to use Photoshop 7 in Wine but not the native macOS version.
"Easily run Windows software on Linux with Bottles!"
That's all you need to know. If Linux wants to be more mainstream it needs to drop the "Bottles is a wrapper around WINE". What's a wrapper? What's WINE? It doesn't matter. All the user need to know that you can easily run Windows software on Linux with Bottles