I don't know why you're getting down-voted, it's a legitimate question since the main page doesn't mention wine once. It is a Wine frontend though, seems to also integrate wine-tricks for dependencies, DXVK and other things from the wine eco-system.

Bottles are isolated Wine environments, similar to containers or VMs. This allows you to install components (e.g. msxml3) to, and modify the configuration of that environment to make the program work without having it affect other applications.

Judging from the Github project page, it uses Wine itself, so is probably just a GUI frontend to it.

I think this uses Wine (it mentions DXVK, which IIRC is for Wine), but handles setting it up correctly for every program you want to use.