Wi-Fi is a wireless networking protocol that devices use to communicate without direct cable connections. It is an industry term that represents a type of wireless local area network (LAN) protocol based on the 802.11 IEEE networking standard.
How does wifi work? | Earth sciences
From the user’s perspective, Wi-Fi is internet access from a wireless device such as a phone, tablet, or laptop. Most modern devices support Wi-Fi, allowing the devices to connect to a network to access the internet and share network resources.
Wi-Fi is the most widely used means of communicating data wirelessly at a fixed location. It is a trademark of the Wi-Fi Alliance, an international association of companies involved in wireless LAN technologies and products.
The easiest way to understand Wi-Fi is to look at an average home or business. The main requirement for Wi-Fi is a device that receives and transmits a wireless signal, usually a router, but sometimes a phone or computer.