The OP's example was specific to secure web browsing, but the question could be interpreted to mean all communications including non-https traffic.

A VPN in addition to any WiFi and browser based security is a good addition. I was required to use one for work, and now use a personal VPN when I am away from home.

Some folks host a personal VPN server somewhere, or they have this functionality running on their router. Others simply setup an account with a provider (free or charged) for this service.

You will also hear of VPNs being used to change the apparent location of a computer. I know of folks who will use this to be able to view streaming video of entertainment not available within their home region.