Social media is a new way to comunication via internet, in these places you can sahe photos, videos, feelings, ideas, talk with other people. from almost any place of the world. Each website have a especial way to share but the important thing is to you have a big opportunity to do business.
Some examples of social media: Facebook, Twitter, Pinterest, Google+, linkedIn and much more, The aim is that people can share about themself.
Social media the best way to gain traffic is to run a series of promotion through social media. Best website to do this is on Facebook; make sure you will involve your website to your promotions, games, challenges and etc. to make sure that you can gain a lot of traffic.
Social media is the convergence of publishing and communications. It's not enough to talk about communications alone.