* To alert other drivers or pedestrians to the car's presence. This is especially important when the car is backing up or turning, or when it is in an area with limited visibility.
* To indicate that the car is about to move forward. This is especially important in busy intersections, where other drivers and pedestrians may not be expecting the car to move.
* To warn other drivers or pedestrians of a potential hazard. For example, a car may beep if it is about to hit another car, pedestrian, or object.
* To communicate with other drivers or pedestrians. For example, a car may beep to say "hello," "thank you," or "excuse me."
