This report delves into the essential roles and responsibilities of the marketing function within an organizational context, specifically focusing on Marks and Spencer. It examines the key roles of marketing in creating value, analyzing product performance, and implementing the marketing mix (product, place, price, promotion). The responsibilities encompass product development, finance, promotion, distribution, planning, selling, and market research. Furthermore, the report highlights the significance of marketing's interrelationship with other functional units such as HRM, finance, and operations management, emphasizing how these collaborations contribute to the overall effectiveness of marketing strategies. Key elements of the marketing function, including research, strategy, planning, and tactics, are discussed, illustrating how they interrelate with other functional units to achieve organizational goals. The analysis also covers marketing's roles and responsibilities within the broader marketing environment, adapting to market trends, managing demand, and ensuring effective product placement and promotion.