On a forum I belong to, a member asked which VPN (Virtual Private Network) I use. For your possible interest, I posted the answer below. If, say, you're traveling and on a public wifi network at a hotel, airport, McDonalds. et al., I think using a VPN is most important so no one can 'listen' in to what you're doing on the internet.
Jim Hamm
It's sort of a hobby for me trying different VPNs, as for many years we traveled a lot in a motorhome and overseas, and a VPN was most useful for me for security reasons. I use several different ones, which include (in no particular order), NordVPN, CyberGhost, Hotspot Shield, PureVPN, VPN Unlimited, and Windscribe. I have found that Hotspot Shield is most effective in NOT reducing download speed significantly, as they all do to some degree -- some more than others. Remember, they first encrypt your data, send it, then un-encrypt it at the other end. Hence, the reduction in download speed. Also, another factor that affects your connection speed is how many servers the VPN has, where they're located, and how many people are using the service at the same time. Some VPNs will tell you the load on a particular server, and you can change servers if it seems overloaded.