The document provides an introduction to consumer behaviour, including definitions of key concepts and the 5-stage consumer decision process. It discusses the nature and scope of studying consumer behaviour, including understanding consumer needs, influences on them, and patterns of shopping behaviour. It also outlines some major worldwide trends in consumer behaviour, such as demographic shifts like an aging population and women in the workforce. Technological trends discussed include an increasingly interconnected world and more tech-savvy customers. The implications of these trends on the 3 roles of consumers are also mentioned.