When you do something, you take some action or perform an activity or task. Do is often used instead of a more specific verb, to talk about a common action involving a particular thing. Do as i say and you won't get into trouble.
Do, accomplish, achieve mean to bring some action to a conclusion. It's one of the most common verbs in english, used in a wide range of contexts, from simple tasks to complex actions. [transitive] do something used to refer to actions that you do not mention by name or do not know about.
What are you doing this.