This document discusses the key roles and responsibilities of marketing functions, the link between marketing roles and organizational processes, and how organizations apply marketing mix to achieve business objectives. It focuses on the case of eBay, a multinational e-commerce corporation. The document also provides an evaluation of various marketing concepts and strategies used by eBay and its competitor, Amazon. Additionally, it includes a discussion on the importance of marketing in customer satisfaction, increasing market share, product development, facing competition, and economic growth. The document concludes with the development of a marketing plan for eBay.