A GPS module is a device that receives signals from Global Positioning System satellites to determine its precise location on Earth. It calculates latitude, longitude, and altitude by triangulating signals from multiple satellites, allowing for accurate positioning. These modules are commonly used in various applications, including smartphones, vehicles, and drones. GPS modules are essential for navigation and mapping services, enabling users to find directions and track movements. They can also be integrated into other systems, such as IoT devices and wearable technology, enhancing functionality by providing real-time location data for various purposes.