Computer Help and Support

The only thing I can think of is that when you are in Europe, there may be some programming available on US that is not available over there. So one thing you can do with (some) VPNs is choose which country that the VPN server is connected to, (i.e., when in Europe, you can still get a US IP address using VPNs). And this works the other way around too, programs not available in US, but available in Europe can be accessed if you select the appropriate country for your VPN connection.

Another reason to use a VPN is if you are using Public WiFi, which is kind of dangerous in today's world of scammers and hackers.

And the other reason people use VPNs is to 'hide' their actual IP address when accessing content that might not be legally obtained.

That is about all I know about VPNs (other than the fact that when connected, all your data is encrypted (this means that even if a hacker can get your wifi stream of data, they can not 'decrypt' it or read/use it.