This report examines the essential role of marketing within the context of Beauty Giant, a UK-based cosmetics company with 50 branches. It explores the key roles and responsibilities of the marketing function, emphasizing market research, sales team formation, communication, customer satisfaction, promotional campaigns, and brand management. The report also analyzes the role of marketing within different organizational contexts, highlighting its interaction with HR, operations, R&D, and finance departments. Furthermore, it details the 7Ps of the marketing mix (product, price, place, promotion, people, process, and physical environment) for Beauty Giant and a competitor, Look Fantastic. Finally, the report develops a comprehensive marketing plan for introducing a new product, outlining the target market, objectives, strategies, and evaluation methods, aiming to enhance Beauty Giant's customer base and sales performance.