the accept button on the website; what's it for?

Question

What is the "accept" button for? I see it at the bottom of answers posted to my question. Am I supposed to use this in some way?

Answer 1

When someone answers your question acceptably, click that button. It puts a green "check mark" on the thread, showing the question was answered.

Answer 2

Indeed, and I think the owner of that post is rewarded with points.

Answer 3

Wish I had an accept button.