Starcraft 2 Hot Key AI

So as a casual player, in the list of hotkeys, I see A.I. build, A.I. expand, etc. Can I, in game, (It’s got its own column in the menu,) automate some aspects of gameplay? I’m flabbergasted that I can’t find any advice about this.

I did the formalities… The work you do before you get aggravated and ask for help. Searched the forums, google, and in-game explanations. Something is going over my head, because not a soul seems to be confused by these A.I. hotkey, or even bring them up.