GPS navigation systems are tools that help people find their way from one location to another using signals from satellites. They work by receiving signals from a network of satellites orbiting the Earth, which allows the system to determine the user's exact position. This information is then used to provide directions, estimated travel time, and distance to the destination. These systems can be found in various devices, including smartphones, cars, and dedicated GPS devices. Users simply enter their desired location, and the system calculates the best route, often considering real-time traffic data to suggest the fastest path.