Parrying is a defensive maneuver, where you swipe your opponent’s punch away.
An L-step is a distinctive step that boxers take to quickly move laterally. Moving laterally is necessary if you want to find more angles and openings for your shots.
Sometimes your straight gets blocked or parried too much. This can happen often if your opponent is used to a straight that comes down the pipe. If this does happen, then throwing an overhand straight can help you land your straight.