The document discusses the challenges of marketing to fragmented audiences. It notes that audiences are more dispersed across various niche communities and marketing channels than ever before. It provides examples from the past of more concentrated audiences, such as the baby boomer generation, who dominated TV viewing. However, it argues that people now want to consume media in their own personalized ways. Thus, smart marketers must find ways to reach consumers across an expanding range of online and offline channels. It provides several case studies of companies adapting their marketing approaches to this new environment of audience fragmentation.