There's a physical switch on it that remaps the keyboard to support windows or Mac, and they also include extra key caps if you prefer the windows logo versus the command logo. One of the three computers that I swap out is a Windows machine, so this keyboard is perfectly capable with both OSs.

You can use the VIA software to physically remap even more keys and because they let you swap between windows and Mac those count as separate layouts and you can create completely different key bindings which is really handy.

This is just marketing guff. What it means is there's a toggle on the side between Mac and windows keycodes so you don't get command moving places when you use it with a Mac like a regular windows keyboard, and it ships with the Mac keycaps installed.

You can swap out the Mac keycaps for windows keycaps (at least when I got it all, the windows keycaps were all in the box) and flick the switch to the windows position and it's a standard PC keyboard.

Mine is actually my Mac keyboard (I've got a ducky shine connected for my personal Linux/Windows dual boot machine as it's easier than fiddling with a KVM or synergy), but I've got it configured as a windows keyboard as I've just been using windows keyboards with macs for like a decade now.

What (I think) this means is that their keyboards have a switch that reverses the location of CMD and Ctrl.