What do you mean when you say "introducing" them? Apple's implementation of modifier keys on the keyboard were essentially released concurrently to that of IBM's (whose 1980's form factor is still the accepted standard for PC's with only a few changes), and it was ahead of Windows by several years.
Side note: I was using a 1984 IBM Model M keyboard as my daily driver (clackity clack!) when I moved from Windows to Mac about 18-months ago with the original release of the M1 Mac Mini. I had re-mapped F1 on that keyboard to function as the Windows key, but sadly found the lack of a dedicated super key on Mac to be too cumbersome, so the ol' trusty Model M is resting peacefully in my closet now. It's still in pretty good shape, although I've been meaning to take advantage of its time off to take it apart and give it a good cleaning...
I also moved from Windows to MacOS. What was the purpose behind introducing ctrl, opt and cmd button? What do they stand for?