A wireless adapter is a device that allows computers and other electronic devices to connect to a wireless network, such as Wi-Fi. It can be built into the device or added externally via a USB port. Wireless adapters enable users to access the internet without the need for physical cables, providing flexibility and convenience. These adapters work by converting data from the device into a radio signal, which is then transmitted to a router. The router connects to the internet and sends the data back to the device. Wireless adapters are essential for laptops, smartphones, and tablets, making them versatile for various environments.