WiFi, also known as 802.11, allows devices to connect to a wireless network without needing wires. An access point is connected to the internet and creates a WiFi hotspot with a range of 100-150 feet indoors. Devices within this range can then connect wirelessly to browse the internet. WiFi standards like 802.11b and g operate at 2.4GHz while 802.11a and n can also use 5GHz. Later standards offer faster speeds and greater ranges. WiFi is popular for homes, small businesses, and public places as it offers mobility and easy installation without wired connections. Potential limitations include interference and limited range compared to wired networks.