This document provides an overview of key concepts in services marketing. It begins by discussing IBM's shift from manufacturing to services, with services now accounting for over half of IBM's revenues. The document then defines what services are and distinguishes between service industries, services as products, customer service, and derived services. It also discusses the tangibility spectrum and trends in the service sector. The rest of the document covers why services marketing is important given the rise of service economies and customers demanding solutions. It then discusses the differences between goods and services marketing and highlights characteristics of services like intangibility. Finally, it introduces the expanded services marketing mix framework which includes people, physical evidence, and processes in addition to the traditional 4Ps.