Just wrote an article on the benefits of social media for any business, this will just be an intro to a series of articles covering the big player social networks.
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Social media is a good way to interact with plenty of people . You can post in social media sites for introducing your self to the world and start getting benefits of lot of traffic from there. But the only thing is provide only ehat you have written else no one would like to visit you again. 
Good luck
Social media is a perfect place for small business but now a days i have seen that people are going crazy behind social media and they forgot that it’s quality which maintain your reputation. Social media should be used properly so people will come back again and again.