This report provides a detailed analysis of marketing functions, responsibilities, and their interrelationships within an organization, using Mark & Spencer as a case study. It examines the key roles of marketing, including promotional activities, planning, customer relationship building, financial considerations, and the use of marketing information systems. The report further explores the connections between the marketing department and other departments, such as human resources, finance, research, and sales. Additionally, it delves into the application of the marketing mix (product, price, promotion, place, physical evidence, people, and process) in the planning process to achieve business goals and objectives, comparing Mark & Spencer to its competitor, Tesco. Finally, the report evaluates a basis marketing plan for an organization, providing insights into strategic marketing practices.