If you don't know what a VPN is, you don't have one and you definitely should consider getting one. I won't go into the the details on how a Virtual Private Network works here. For that, you'll want to check out the VPN hub that I've been asked to curate for Macworld. The hub, which I'll be updating on an ongoing basis, details what a VPN is, what it isn't and why you might want to use one. More importantly, I go into detail on which ones deserves your hard earned money.