I've turned on reputation/thanks

Let's have a play with this one.

You can click to give someone reputation (positive or negative), or if they have done something particuarly useful/impressive click the 'thanks' button.

More on 'thanks' - from the FAQ

"This option will display a button "thanks" in the topic that you started, and you can click it once per topic if you feel that the reply given by the member is the most helpful."