In 3D fighting games, sidestepping helps you to open your opponent for combos or a special grab. Don't abuse it, because remember that everything you can do, your opponent also can do it. Sidestepping also helps you to get out of a bad situation as when your back is against the wall, stuck in a corner combo or you know that he is going to attack you while running. There are a lot of uses for taking advantage of sidestepping, but for now, I just want you to focus on sidestepping and then grab. Lower ranks never expect a throw after the sidestep.