Used to smoothly change the subject or move past a point without elaborate explanation. We had some initial problems, but, at any rate, we're on schedule now.
Pro Tip 2/3
Conversational Emphasis
Highlights the importance of what follows, indicating that it should be focused on. I don't know about the details, at any rate, we need to decide today.
Pro Tip 3/3
Disregarding Details
Shows that specific details are not important to the overall understanding or outcome. He might not have agreed, but at any rate, the decision has been made.