Wi-Fi is a type of wireless networking technology. It enables you to connect your device to the Internet without any cables. You can set up Wi-Fi in your home or connect to public Wi-Fi. There are some potential hazards to using public Wi-Fi, such as slower connection speeds and potential security hazards, which are discussed later.

Wi-Fi is supplied through a router. Your computer or other device will transmit data through a radio signal. The router picks up that data, decodes it, and sends to the Internet via its wired Ethernet connection. The router communicates back to the connected device with its own radio signal, and thus your Internet connection is established.