Social media marketing, or SMM, is a marketing strategy that takes implements social networking sites like Facebook and Twi tter in order to achieve marketing and branding goals. Companies create content, images, and video that encourages viewers to share or like it on their social networks. This tactic is driven by word-of-mouth marketing, or unpaid promotion, in which satisfied viewers tell other people how much they like you. Word-of-mouth marketing is a cheaper and more efficient alterna...