How should we do in the social media sites?

I have got an id of facebook, twitter, myspace, and google+, but how does that come into effect for my brand or my selling products?

I interact with people on facebook, re=tweet the information again and again, but seems that it lacks something there for my social media activity!!! What is that?

Sorry, but this is far too vague a question, as a simple search would have sufficed to answer the question. Please search (both the forums and via your favorite search engine), and if you’ve still got SPECIFIC questions, please feel free to repost.

In the meantime, THREAD CLOSED.