A Wi-Fi module is a small electronic component that allows devices to connect to a wireless network. It typically includes a radio transmitter and receiver, enabling communication over radio waves. These modules are commonly used in various devices, such as smartphones, laptops, and smart home appliances, to access the internet without the need for physical cables. Wi-Fi modules come in different types and standards, such as 802.11n and 802.11ac, which determine their speed and range. They can be integrated into devices or used as standalone units, making it easier for manufacturers to add wireless capabilities to their products.