[robertpateii]

VPNs protect you from snooping by 3rd parties on the way to Bob's site, such as your ISP, anyone on your network, or anyone on any of the intervening nodes between you and Bob's.

If you don't want Bob to identify you then yeah you need more than just VPN such as ad blockers, disabling cookies, and more.

[fulafel]

Depends on what you mean by VPN but the let-me-bittorrent ones don't get you confidentiality (or integrity) to web sites you visit, past your immediate ISP.