A GPS receiver is a device that determines its location using signals from a network of satellites. It calculates the distance to at least four satellites to pinpoint its exact position on Earth. This technology is widely used in various applications, including navigation for vehicles, smartphones, and outdoor activities. GPS receivers work by interpreting signals transmitted by the Global Positioning System satellites, which orbit the Earth. These signals contain information about the satellite's location and the time the signal was sent. By analyzing this data, the receiver can provide accurate location information, helping users find their way or track movements.