While we are talking about the social media very first we should be clear about the term social media and if you wish to know what is social media then to understand it better you should break the word in to two so now we have social and media. We very well know what is media, media is a way of communication it is an instrument of communication and thus that makes the social media a social communication instrument which helps to spread the social news through media. There are many social media company who works for the same. a website that doesn't just give you information, but interacts with you while giving you that information. This interaction can be as simple as asking for your comments or letting you vote on an article, or it can be as complex as flixter recommending movies to you based on the ratings of other people with similar interests.
Think of regular media as a one-way street where you can read a newspaper or listen to a report on television, but you have very limited ability to give your thoughts on the matter.
Social media, on the other hand, is a two-way street that gives you the ability to communicate too.