Just so you know, even high-quality VPNs cost money to run. It doesn't work well for things like gaming or live voice/video chat because the VPN adds a lot of delay (called latency).

Useful for business.

The idea is to connect remote employees to the office's file servers, email servers, and other services without exposing them directly to the Internet.

If you work online with imprecise information.

A VPN can cover your tracks, for example, if you're downloading torrents or doing other things that aren't legal in your country.

Privacy.

There's no way to know what's going on with public WiFi. It could be WPA2 protected or totally open. It could be installed by a network professional with the right equipment. Therefore, it's very secure... Usually the business owner just plugs in a $90 router and sets a passphrase. Your device will be more vulnerable to attacks if you use public Wi-Fi, because non-https traffic can be watched.

People are crazy about using VPNs for privacy, but they have no clue what that means. Angry at ISPs spying on their traffic, they get a free VPN service that sells their data worse than any ISP. On top of that, they usually do 101 things to compromise their privacy anyway; things like geo-tagging and posting on social media every aspect of their day, downloading and using apps like FaceApp, or just blindly clicking yes on app permissions and giving a game access to their contacts or a calculator access to their files. On top of that, a VPN works at layers 3 and 4 of the OSI model; your browser, your search engine, your app, and your operating system all operate at layers 5–7 so they can track/monitor your internet activity outside of where a VPN can protect it.

If you're doing sketchy things, you can either use a VPN or a dedicated computer with a VPN always on. Get a travel router and configure it with VPN and then set it up at each hotel you stay at if you travel a lot. In most circumstances, getting a VPN for home use is completely unnecessary and almost pointless if you're just jumping on the privacy bandwagon. Don't worry about what the ISP can see until you've secured your other habits.

Original source: Quora