It shows that "Community User" has reviewed and approved the edit I proposed.
When a reviewer (2k+) improves a suggested edit then it is marked as reviewed and approved by community.
In your example Ben N chose "Improve Edit" during the review.
Why Community in this case?
This is by design. I wanted a simple way to track all the edits that are approved through "improve", it is still easy to track who caused it, cause they are the editors of the revision directly after it.