Hello Mikekane - and welcome to the Forum.
Virtual Private Networks aren't
necessary but can be useful. For example; I object to the way Google tracks one all over the web and accumulates information about users gathered from all Google's applications that are being used increasingly by your everyday, high-street company. So if I need to use Google Maps (which I have to say is very good) I use a VPN to hide my location and IP address.
But it's not all plain-sailing. Free VPNs are free for a reason, just as Google & Facebook are, so one might think that a paid-for VPN service would be better but this is not always the case. This link
https://us.norton.com/internetsecurity-privacy-safe-vpn.html from Norton (of anti-virus fame) explains VPNs and what to look out for.
There are trustworthy VPN services available for free: I use the free version of protonvpn - look here for pricing plans:
https://protonvpn.com/about. The free version is supported by the income they receive from those who pay. Proton mail also has a free mail service that is ultra secure - do look at
https://protonmail.com/. All communication between you and their servers is encrypted and if you lose your password, they can't help you as even they can't access your files!
Overall; I would say that the use of a VPN depends on how keen you are to avoid even your ISP snooping on you, and if you decide to use one I thoroughly recommend Protonvpn (and Protonmail).
Keith