What does anger tell me?

Anger can mean a lot of things to me, it depends on the context of the emotion. For example, when I am talking to someone and I see a micro-expression that shows me anger, I know that whatever I said must have been offending or hurtful for that person. If I don't notice it and I keep on going with my story I might upset him/her even more, which may eventually lead to an argument. When I see the micro-expression I know that whatever I said was hurtful and I can stop my story and apologize or explain what I meant with my story. This way I may have avoided an argument and saved a friendship.

Anger certainly is not my favorite emotion to see, feel or experience. It is , however, important that you know how to deal with it and to stop it in the act, if you can.