What Is VPN?
A Virtual Private Network (VPN) encrypts and sends all Internet data from your computer through another computer. A VPN protects your traffic from being spied on locally, but your VPN provider can still keep logs of the websites you access, or even let a third party snoop directly on your web browsing. Depending on your threat model, the possibility of a government listening in on your VPN connection or getting hold of VPN logs may be a significant risk. For some users, this could outweigh the short-term benefits of using a VPN. – eff.
What Is Your I.P Address?
A device on the Internet needs its own address to receive data, just like a home or business needs a street address to receive physical mail. This address is its IP (Internet Protocol) address. This doesn’t necessarily reveal either your identity (it’s hard to map an IP address to a real address or a particular computer). An IP address can give away some information about you, however, such as your rough location or the name of your Internet Service Provider. Services like Tor let you hide your IP address, which helps give you anonymity online. – eff