Find out which VPN service is right for you, and whether you need to pay for the service, with this guide. A virtual private network, or VPN, is the best tool to protect your personal information when online. The question is: which VPN is best for you? We have compared the best VPNs (both paid and free) in the UK to give you an answer. A VPN is essentially a connection method used to boost the security and privacy of private and public networks, like the internet.