What is Social Media Marketing? http://blackboxsocialmedia.com/social-media-marketing/
Social media marketing is one of the newest forms of marketing that takes advantage of the rise in popularity of social media sites such as Facebook, Twitter and YouTube.
Marketing through social media allows a business to utilize and profit from the use of web 2.0 platforms, such as blogs, social networking sites, and other emerging marketing tools. http://socialmediain7minutes.com
Social media differs from traditional media in that it involves two-way communication, where users are empowered to generate content and businesses are incentivized to communicate with their customers.