It allows you to move and resize windows by using the Alt key and clicking wherever on the window instead of relying on very precise clicking. This behavior is very common on Linux distributions and is not actually hard to implement on Windows.
speaking of windows utils that make your life easier, I'm going to steal this post and shamelessly promote one of the best Win10/11 tiling window managers, Komorebi:
https://github.com/LGUG2Z/komorebi
which among other things also is made to work with and bundled with whkd, which is like autohotkey except it just sends cmd/powershell commands for each keybinding instead of more complex things. It's pretty neat.
The dev is pretty active, and so is the community. A lot of it's on a discord (sad, but lowest-upkeep until someone makes a better method, so I get it for what amounts to a one-man show most of the time), but he and the community still read the issue tracker and the github discussion forum.
It's in rust, and it's... I would not say the code itself is simple to comprehend, but so much of that is winAPI's fault. But it works like a charm, is snappy, and only has problems when I hibernate my machine, because my dock boots the monitors in a random order.

