The document discusses various aspects of social media including social networks, blogs, photos, video, and Twitter. It provides details on how Twitter works as a microblogging platform and allows users to follow others and see their 140 character status updates. As an example, it outlines Skittles' use of an integrated social media campaign across Facebook, YouTube, Flickr, and Twitter. It also describes Twestival, a global event held in 202 cities in 2009 that brought together the Twitter community to raise money and awareness for charity: water. The document concludes with lessons for using social media that emphasize listening, learning, sharing, and actively engaging on these platforms.