GPS modules are devices that use signals from the Global Positioning System (GPS) to determine the location of a device. They are used in a variety of applications, from navigation and tracking systems to aerospace and military purposes. GPS modules typically have a receiver and an antenna, which receives the signal from the satellites in the GPS network. The coordinates received from the satellites are then used to provide the user with an accurate location and time. GPS modules are often connected to other electronic devices such as cell phones, computers, and navigation systems, to provide users with mapping information, direction, and other data. GPS modules can also come with a variety of additional features, such as the ability to store points of interest (POIs) and plot custom routes.