You’ve probably heard or seen a thousand different ads for a VPN, promising all sorts of security from hackers and the like. Josh has a really good breakdown here of why nearly all of that is a load of malarky, and what you should use a VPN for:

And if you don’t currently use a VPN, but would like to start, I heartily recommend ProtonVPN or Mullvad. I personally use both (depends on device and circumstance), and have been very happy with them.

Disclaimer: The link to ProtonVPN is an affiliate link, but I have been a paying user for their services for a decade.