Or ask ChatGPT:
"A Wi-Fi signal, also known as a wireless signal, refers to the radio waves used to transmit data wirelessly between electronic devices such as computers, smartphones, tablets, and routers. The term "Wi-Fi" stands for "Wireless Fidelity" and is a technology that allows devices to connect to the internet or communicate with each other without the need for physical wired connections.
A Wi-Fi signal operates within the radio frequency range, specifically in the 2.4 gigahertz (GHz) and 5 gigahertz (GHz) bands. These frequencies are unlicensed and available for public use, which allows for widespread adoption and use of Wi-Fi technology.
When a device, such as a laptop or smartphone, is equipped with a Wi-Fi adapter or chipset, it can receive and transmit data using these radio waves. The data is typically encoded and modulated into the radio waves, which are then transmitted through the air. A Wi-Fi router acts as a central hub that receives data from connected devices and relays it to other devices or to the internet through a wired connection."