https://techcrunch.com/2018/07/28/verizons-new-safe-wi-fi-is-a-vpn-that-blocks-ad-tracking-for-3-99-a-month/

Verizon has rolled out a new product called Safe Wi-Fi, a VPN that provides a security stop gap for its mobile customers logging onto a public network. It’s also being marketed as a way to block ads.

So WTF is a VPN and why does it matter? A VPN is a virtual private network. It sits between a device in front of you and a server in a data center. Think of it as a tunnel that cloaks or hides your internet traffic from other folks on your local network. That open Wi-Fi at your local coffee shop can give advertisers and more nefarious types the ability to track your IP address. A VPN provides a secure connection between you and the server, and hides the IP address from prying eyes.