Wireless network adapters are devices that enable computers and other devices to connect to wireless networks. These adapters can be built-in or added externally via USB or other ports. They convert data into radio signals and transmit them to a wireless router or access point, allowing devices to communicate without physical cables. Wireless network adapters are essential for accessing Wi-Fi networks, providing flexibility and mobility for users. They come in various types, supporting different Wi-Fi standards and speeds, making them crucial for maintaining efficient and convenient wireless connectivity in homes, offices, and public spaces.