The "Habit Loop" is a concept that explains how habits are formed and maintained. It consists of three main components: the cue, the routine, and the reward. The cue is a trigger that initiates the habit, the routine is the behavior that follows, and the reward is the positive outcome that reinforces the behavior, making it more likely to occur again. Understanding the Habit Loop can help individuals change unwanted habits or develop new, positive ones. By identifying the cues and rewards associated with a habit, one can modify the routine to create healthier behaviors, ultimately leading to improved well-being and productivity.