This document discusses social media marketing and its key elements. It begins by defining social media and marketing. Social media marketing refers to using social media sites to gain website traffic or attention. The document then explains the four P's of marketing - product, price, place, and promotion. It provides examples of different social media types (e.g. Facebook, LinkedIn), their target markets, and features used to attract each market. Ratings of target market size and followership are given for each type. The role of social media in marketing is described as providing target audience information and facilitating electronic word of mouth recommendations. Ways a company can leverage social media to increase sales through activities like communication, advertising, and promotion are outlined.