If you use apt-get you aren’t using snaps, you are unaffected.
Snap is a format created by Canonical which has a really funky proprietary back end. The default application store in Ubuntu uses this format and has been plagued with an impersonation problem. Since everyone could submit snaps there was a lot of spyware posing as legit software. My main gripe was when the snap store just decided to unilaterally close and update my Firefox while I was using it.
Linux Mint does NOT have snaps and even had a debian based version. Pretty neat