A WiFi dongle is a small, portable device that allows a computer, laptop, or other devices to connect to the internet wirelessly. It plugs into a USB port and works by receiving WiFi signals from a nearby router or network. WiFi dongles are especially useful for devices that do not have built-in wireless capabilities or in situations where a wired connection is unavailable. They are often used for internet access on the go, providing convenience in areas like cafes, libraries, or while traveling. Some WiFi dongles also support mobile networks, allowing users to connect via 4G or 5G data, making them versatile for both home and remote use.