Mine behaves mostly as it normally would on Windows. KDE Plasma has it open the launcher, and there are shortcuts using it that mostly match Windows. It'll be highly DE-dependent I imagine.

Now, what to do with the copilot button?

I use it to contol my OS, of course!

My superkey controls my OS (window-manager, music, launcher, brightness, etc).

My alt-key controls my tmux and browser

My ctrl-key controls the app (vim/bash/mpd)

Super. Similar to how it's used in windows

It opens the start menu.

looks at community name

Oh. It, uh...opens, er...Flatpaks?

Being able to drag and resize windows without having to aim at the title bar with Meta and Left or Right click is a killer feature.
When I have to use Windows I install AltSnap because living without is too painful lmao

I dont have a windows key https://www.pckeyboard.com/page/product/LinTuxSet

I built a custom keyboard, and I used the Mac version of the meta key instead of the windows key. Now that buttons serves as $mod for i3

Nothing. The sole Windows key on my keyboard has never been intentionally pressed except by my cat.

I have a Framework 13 with the super button instead of Windows button, but I've set it up similarly to how the Windows buttons works in Windows. Pressing it by itself opens the KDE app menu, super+D goes to desktop, super+L locks screen, super+[ or ] moves around virtual desktops, super+W shows overview, supe+T shows tiles config, super+arrows do snapping, super+PgUp/PgDn/X for maximize/minimize/close etc.

KDE default, so it opens the start menu, or launcher. Whichever you want to call it.

For me, Win+space opens up xfce4-appfinder for me (or Enlightenment's "Everything" launcher if I'm in Enlightenment). Then I have Win+s set to toggle xscreensaver being enabled or disabled. Win+up maximizes a window, win+left maximizes it just vertically. I think I have win+down set to minimize, but it's been a while since I've used that, and I'm not at a computer right now.

nothing on its own i use it as a modifier key

Meta-Tab switches between activities on KDE.

Don't call it Windows key. It's Meta, even if Micro$oft paid to put an advert on it.

I remapped alt to ctrl as God intended, and ‘windows’ and the context-menu keys to alt. Coincidentally, the ctrl keys stopped working on my laptop for some reason, but if they worked, I'd map them to ‘super’ and put some obscure os-wide functions on there, like enabling/disabling Bluetooth. Or would just switch to English and my language with one press of a particular key.

Hyper or meh keys would be a good use.