The document discusses the evolution of personalization, from mass production and mass markets to more customized experiences. It describes how personalization has progressed from broadcasting uniform messages to mass audiences to narrowcasting tailored messages to smaller consumer segments and individual customers. The trend is driven by factors like mobility, social media, big data, and connected products that enable more personalized experiences and real-time interactions. The document argues that effective personalization can significantly increase returns on marketing investments and customer sales.