This report delves into the fundamental concepts of marketing, including the marketing mix and marketing plan, using Tesco as a case study. It examines the key roles and responsibilities of the marketing function within Tesco, highlighting its interrelation with other functional units. The report further compares Tesco's marketing mix (7Ps) with that of Sainsbury, another prominent UK supermarket chain, to understand how these elements contribute to achieving overall business objectives. Finally, it develops and evaluates a basic marketing plan for Tesco, outlining strategies, tactics, and measures for achieving specific marketing goals.