It increases security against ISP surveillance, local attacks (DNS poisoning, man in the middle) performed by adversaries on your local network, hostile access

It increases security against ISP surveillance, local attacks (DNS poisoning, man in the middle) performed by adversaries on your local network, hostile access points and other public honey pot attacks, and general eavesdropping anywhere between you and the VPN provider. It also helps combat network non-neutrality by making it hard for your ISP to throttle or selectively prioritize traffic. Regular privacy VPNs will not protect you against adversaries beyond the VPN in the network path, nor will they protect your anonymity against highly sophisticated or nation state level attackers with the capacity to either surveil the network broadly or just subpoena the VPN provider.