A car GPS (Global Positioning System) is a navigation device that uses satellite signals to determine your location and provide directions to your desired destination. It typically consists of a display screen, internal memory, and a GPS receiver.Car GPS devices usually have a preloaded map database that allows you to navigate to any location in the world. You can enter a specific address or point of interest, and the GPS will calculate the best route based on your current location and the road network. Some car GPS devices also provide real-time traffic updates to help you avoid congested areas and find the fastest route to your destination.