Automatic headlights refer to a feature in some vehicles that automatically turns on the vehicle's headlights when it gets dark or during rainy weather conditions. This is done through the use of light sensors, which detect changes in ambient light levels and trigger the lights accordingly. The purpose of this feature is to improve safety by providing better visibility for the driver and other road users, especially during low-light conditions such as dawn, dusk, or at nighttime when it can be more challenging to see the road ahead.