This report provides a comprehensive overview of the marketing essentials within Tesco, a leading multinational retailer. It begins by outlining the key roles and responsibilities of the marketing function, emphasizing the importance of market research, marketing plan construction, product development, distribution, and customer support services. The report then explores the crucial interrelationship between the marketing department and other functional units, such as finance, human resources, production, and sales, highlighting how these departments must collaborate to achieve overall business objectives. Furthermore, the report details the five elements of the marketing process (production, product, selling, marketing, and societal marketing concepts), and the roles and responsibilities of the marketing department concerning the marketing environment. Finally, the report examines key elements of marketing functions, including research, strategy, planning, and tactics and their interrelation with other functional units. The report also includes an analysis of the marketing mix, specifically the 7Ps (Product, Price, Place, Promotion, People, Process, and Physical Evidence) and their application within Tesco.