In this book, the authors explore the ramifications of social media. As everyday people increasingly create content on behalf of companies, brands, or products, they are collaborating with others just like themselves and forming ever-growing communities of enthusiasts and evangelists. From the rough to the sophisticated, the "user-generated media" of blogs, online bulletin boards, podcasts, photos, songs, and animations are influencing companies' customer relationships, product design, and marketing campaigns, whether the companies participate willingly or not.