Solution:

Wireless Fidelity is a brand, originally licensed by the Wi-Fi Alliance to describe the underlying technology of wireless local area networks (WLAN).

These are the most widely used computer networks in the world, used globally in home and small office networks to link desktop and laptop computers, tablet computers, smartphones, smart TVs, printers, and smart speakers together and to a wireless router to connect them to the Internet, and in wireless access points in public places like coffee shops, hotels, libraries and airports to provide the public Internet access for mobile devices.