This chapter introduces digital marketing and discusses its potential to engage audiences through integrated online communications channels. It defines key terms like e-commerce, digital business, and digital marketing. It outlines different online communications options for B2C, B2B, C2C, and C2B interactions. The chapter also discusses the objectives of digital marketing, known as the "5 S's" - Sell, Serve, Speak, Save, and Sizzle. It emphasizes the importance of an integrated digital marketing strategy and tactics to achieve business objectives online through the right mix of online channels and customer communications.