This report examines the marketing essentials, roles, and responsibilities of marketing functions within an organization, using Aldi plc as a case study. It highlights the significance of marketing in promoting products and services, attracting customers, and maintaining relationships. The report discusses the roles of the marketing department, including campaign management, promotional material production, and social media management. It also covers responsibilities such as product development, communication, sales support, and event organization. The interrelationships between marketing and other departments are emphasized, noting the importance of support from finance, HR, sales, and production. The report further analyzes Aldi plc's marketing plan using the SOSTAC model, focusing on situation analysis, objectives, strategy, tactics (marketing mix), action, and control/monitoring. It concludes that Aldi's success is due to its unique retailing approach, high-quality products at lower prices, and multichannel promotion.