This report discusses the concept and definition of marketing in the 21st century, the role of marketing function, and how it interacts with other departments. It also explains the extended marketing mix and provides examples from Sainsbury, a leading supermarket chain in the UK. The report evaluates how the marketing mix adopted by Sainsbury contributes to the success of the organization in meeting their overall business objectives. Additionally, it provides recommendations and a marketing plan for launching a new product line.