Thank the lord. This PC business is for the birds.
Something particularly irritating about PCs is that the window manager aspect of Windows fails to provide a utility to tab through multiple windows of the same application conveniently.
Example, you have 3 “windows” of your browser open (I suggest you grab Thundebird from Mozilla.org) and you want to cycle through them without using a mouse or navigating to the taskbar.
Can’t do it.
In the Mac universe the command+~ key will cycle through them. Add a shift to that and it will cycle backwards.
This is very handy for those who want to keep their hands on the keyboard (fast) versus having to lift a hand and move to a mouse (or trackpad, or keyboard nipple).