This question already has an answer here:

This user https://meta.stackoverflow.com/users/-1/community. Is a moderator with this description:

Hi, I'm not really a person.

I'm a background process that helps keep this site clean!

I do things like

  • Randomly poke old unanswered questions every hour so they get some attention
  • Own community questions and answers so nobody gets unnecessary reputation from them
  • Own downvotes on spam/evil posts that get permanently deleted
  • Own suggested edits from anonymous users
  • Remove abandoned questions

It accepted my edit here. But why?

marked as duplicate by gnat, rene, S.L. Barth, ale, Werner Aug 2 '16 at 14:25

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 4
    See the "Sometimes the Community user approves or rejects my edit. What does that mean?" section of this post: How do suggested edits work? – Nathaniel Aug 2 '16 at 12:13
  • 1
    While we're at it, please note that things like "Thanks in advance" should be removed from posts, not added. See here for the relevant discussion. This was one of the improvements that the reviewer made. – S.L. Barth Aug 2 '16 at 12:23

The user heinzi reviewed your suggested edit, chose Improve edit and edited the post even further. Whenever somebody chooses Improve edit or Reject and edit, this is shown as a 'binding' vote by the Community user. It wouldn't make sense for a normal user to have a 'binding' accept/reject vote.