The 11g Wireless USB Adapter refers to a wireless network adapter that uses 802.11g Wi-Fi technology to enable your computer to connect to wireless networks. The "11g" is a Wi-Fi standard that provides wireless speeds of up to 54 Mbps on the 2.4 GHz frequency band. The adapter typically connects to your computer via a USB port, making it easy to add wireless capability to desktops or older laptops that lack built-in Wi-Fi. The Windows driver for this adapter allows your operating system to communicate with the adapter, enabling wireless connectivity.