This is one question that many people think they know, but the sad thing is the vast majority of marketers do not know how to effectively use Social Media in their business. Most Internet Marketers get on various social sites and try to start selling stuff right away. This is the wrong mentality to take when building up your social media presence. Social media is about interaction and building up a reputation and if you use it as such you will make a lot more money in the end. Perry Belcher does a good job of explaining this aspect of social media in the video below.
Just ask yourself this question, If you met someone on the street and they immediately started trying to sell you a timeshare, would you become friends with that person? Probably not. Social media is no different. Talk to people on social media with the intention of making friends. After you have made friends with them, then perhaps they may be interested in what you are selling but never assume that is the case. The main goal of social media is to network with likeminded people. If you make a sell or two because of that networking then great otherwise just enjoy the friendship. If you take this mentality with social networks then not only will you make more money from them you may just make a good friend or 2 or 10,000

Social Media is a important tache, Pressure of public opinion is very strong
The popularity of social media can be attributed to the rise and rise of internet marketing. One has proved facilitator to the other.
The booster shot in the growth of social media is invariably the tremendous growth in internet marketing.
The ability to use Social Media in business to develop untapped markets therefrom is crucial now with the internet.
The need in social media marketing is to have the patience and perseverance to consider it a long haul for generating business. Its not a quick-fix set up.