A side mirror, also known as a wing mirror, is a reflective device mounted on the exterior of a vehicle. Its primary purpose is to provide the driver with a view of the area beside and behind the car, helping to enhance safety while driving. Side mirrors are typically adjustable and may include features like heating, auto-dimming, or integrated turn signals. Most vehicles are equipped with two side mirrors, one on each side, to ensure a comprehensive view of surrounding traffic. Some modern cars also offer blind-spot monitoring systems that alert drivers to vehicles in their blind spots, further improving safety.