Hello

Example
Say you are physically in the UK but want to appear as if you are in the USA, you would connect to a VPN server in the USA. You can check this link http://geoip.hidemyass.com and it will confirm your location, IP address and your ISP.

Some VPN company's have hundreds of servers in, for eg, the USA, so you can connect to all different States.

The ISP will be that of the VPN company (they may own the server or rent it). Your ISP will see that you have connected to a VPN but they won't see what websites you visit, unless it leaks DNS.

If you are having issues and your physical IP location isn't changing, take a look at these instructions. https://support.hidemyass.com/hc/en-us/articles/202722166-A-checklist-to-make-sure-your-real-location-hasn-t-been-leaked

There are loads of other help articles on that site too or feel free to ask me.