Wi-Fi is a wireless networking technology that allows electronic devices to connect to the internet and communicate with one another wirelessly. It was invented in 1991 and standardized as IEEE 802.11x. Wi-Fi works by transmitting data via radio signals within a certain range, allowing devices like computers, printers, and hard drives to connect and share resources without wires. It uses common protocols that enable many different types of devices, including phones, cameras, laptops, and game consoles, to connect to each other and access networks. Security is also an important aspect of Wi-Fi technology.