The document discusses the large size and impact of social media. It notes that 3 out of 4 online Americans use social media, Twitter averages 3 million tweets per day, and Facebook would be the 8th largest country. It recommends that companies have a social media presence because 85% of users believe companies should interact with customers and 93% believe all companies should have a social media presence. The document provides tips on listening to audiences, understanding their needs, and engaging with communities on social media. It also discusses measuring the impact of social media efforts.