What does the
Community user do?
In particular, the description says that one of the things that it does is
Randomly poke old unanswered questions every hour so they get some attention
What does that mean?
Meta Stack Exchange is a question and answer site for meta-discussion of the Stack Exchange family of Q&A websites. It only takes a minute to sign up.Sign up to join this community
By poking, it means bumping so it shows back up on the main screen just like an edit would.
This post has more information:
Why does a question appear as modified by the Community user