This presentation explores the transformative nature of e-commerce, defined as electronically enabled commercial transactions that leverage unique characteristics like ubiquity, global reach, and information density to reshape traditional digital markets. By reducing information asymmetry and search costs, e-commerce enables dynamic pricing and disintermediation, while digital goods—such as music and software—benefit from near-zero marginal costs of delivery. The text details various business models, including B2C, B2B, and C2C, alongside diverse revenue streams like advertising and subscriptions. It further examines the rapid growth of social and mobile commerce (m-commerce), the role of Electronic Data Interchange (EDI) in streamlining business supply chains, and the strategic requirements for building a robust digital presence across websites, social media, and mobile platforms.