A GPS module is a device that receives signals from satellites to determine its precise location on Earth. It uses the Global Positioning System (GPS), which consists of a network of satellites orbiting the planet. By calculating the time it takes for signals to travel from these satellites to the module, it can accurately pinpoint its latitude, longitude, and altitude. GPS modules are commonly used in various applications, including navigation systems in vehicles, smartphones, and outdoor activities like hiking. They can also be integrated into other devices, such as drones and robotics, to provide location tracking and enhance functionality.