Chapter 9 of 'Essentials of Business Information Systems' focuses on e-commerce, exploring its unique features, types, and the transformative impact of internet technology on business models. It discusses the growth of digital markets, key aspects of e-commerce such as global reach, personalization, and the roles of m-commerce, as well as various payment systems and business models. The chapter emphasizes the significance of digital goods and the evolving landscape of consumer and business transactions in a global marketplace.