This report delves into the marketing essentials, focusing on the roles and responsibilities within an organization, particularly through the lens of TESCO. It examines the significance of marketing functions, including human resources, IT, research and development, and customer service, in promoting the business and its mission. The report analyzes the marketing mix, emphasizing its role in achieving organizational objectives. Furthermore, it discusses the importance of marketing planning, outlining the processes involved in developing and adapting plans to meet market needs and customer expectations. The report also explores the interrelation of marketing functions with other organizational units and functions, highlighting the roles of product planning, research, development, sales, and financial services. The analysis encompasses marketing research, product development, strategy management, and distribution systems, emphasizing the importance of planning, promotion, finance, communication, selling, and product development in achieving marketing goals.