A VPN is a must for all internet connections nowadays, everyone should use one regardless of it's usage it should be considered just another cost of using the internet (unless speed is a priority above security)
What are your requirements?
Speed - all VPNs can suffer from lag at one time or another, can you see the milliseconds speed for each of the connections you can choose from, VPN speed is also dependent on your own internet connection, are there any dedicated (£££) trading VPNs with guaranteed speeds (outside of your internet provider connection) what speeds do you actually need?
Log keeping - is this a concern? Lots keep logs for legal reasons a few claim they do not.
Cost - obvious one really, beware freebies and cheapies, but also expensive does not necessarily mean better.
Reliability - are connections always available, does it drop the connection.
Locality - are local servers available in your local region, countries you are visiting, do you need to 'pretend' you are connecting from a different country in order to use a service?
Security - what level of encryption is offered, does it really obscure your IP, do you want to stop comms if the VPN fails.
Processing overhead - how much local compute will be consumed
Ease of use, install, config - another obvious one
Mobile app - do you need the same protection on a mobile phone?
I've been using PIA for years around the globe with very few problems
https://www.privateinternetaccess.com/