Like most 3PS/Hero based arena games, the layout of most maps/ "arenas" are in a standard "3 Lane Layout" (3LL) (left, right, and middle). Understanding of these lanes and what happens most in these lanes, can drastically change how you play not only T3 Arena but OW2 as well for example. The "3 Lane Layout" is designed to make the middle lane the central point where the objective is being held or pushed, and allowing the left and right lanes to be used for flanking, support placement, (3/5 times) a sniper of some sort. These are some terms you can use to better understand what's happening and give better comms if needed.