what is doer

A doer is a person or thing that does something or acts in a specified manner. It refers to someone who takes an active part in something, rather than just thinking or talking about it. A doer is an active or energetic person. It can also refer to a person who gets things done with vigor and efficiency. The term is often used in contrast to a thinker, who is someone who thinks or talks about things, but does not necessarily take action.