It is my modifier key for any window management keybind. Using alt or control might overlap with other apps or games. For example, I do super+r to open my app launcher or super+w to close a window. It does not do anything on its own.
I had mostly the same keybinds when I used windows. Ofc I can’t remember how I did them as it was a long time ago.
I literally just installed it on a spare laptop. I was going to install the lts, but saw a new release and couldn’t resist. Things seem pretty good so far.