Most football people define pro style to mean a bill Walsh inspired primarily one back limited running game with inside zone, outside zone and possibly a run featuring an adjuster h back wham blocked running play
uses a variety of formations but likes to get to a 1 back, adjuster h back and a tight end
play action passing game
quarterback that hands off and is not used as runner designed or otherwise
lots of straight drop back passing from both under center and shotgun
likes to create mismatches and create constraints with tight ends or big athletic h backs that can either create an additional run gap, motion, reset or threaten the deep middle zone in unfavorable matchups
passing concepts that attack all portions of the field