This report provides a detailed marketing analysis of ASOS Plc, a British online fashion retailer. It begins by outlining the roles and responsibilities of the marketing function, including product offering, demand management, market expansion, customer care, and legal obligations. The report then explores the interrelationship between the marketing department and other organizational functions such as production, finance, human resources, and customer service. Furthermore, it compares ASOS's marketing mix (product, place, price, promotion) with its competitors, Arcadia, highlighting differences in product offerings, distribution channels, pricing strategies, and promotional activities. The report also evaluates the development of ASOS's marketing plan, including SWOT, PEST, Porter's Five Forces, differentiation, and STP analyses, to understand the company's internal and external factors. The report concludes by summarizing the key findings and providing insights into ASOS's marketing strategies.