WiFi is a made-up marketing term that doesnt really stand for anything. WiFi is short for wireless fidelity because the term hi-fi stands for high fidelity A WiFi hotspot is any physical location where a device can connect to the Internet through a Wireless Local Area Network (WLAN) A VPN wraps your network traffic (including web browsing, email, and other things) in a protective tunnel and makes up for any weaknesses in their encryption.”]
Source: https://blog.malwarebytes.com/101/2021/05/what-does-wifi-stand-for/