What is Social media marketing

Social media marketing refers to the process of gaining recognition, loyalty, direct feedback or attention through social media sites. It gives brands a way to communicate with old, new and potential customers. It helps brands to open a personalized dialog and help them spread their message in relaxed and conversational way.
Social media marketing plans usually center on efforts to create content that attracts attention and encourages readers to share it with their social networks.Weather its an corporate message or a product launch, the message spreads from user to user and presumably resonates because it appears to come from a trusted, third-party source, as opposed to the brand or company itself.
Major medium used in social media marketing:
Facebook
Twitter
Google +
Myspace
Pinterst
Youtube
Blogs