The document discusses the roles and responsibilities of marketing people in different types of markets, including consumer, business, global, and non-profit markets. It outlines that marketer's roles include understanding customers, segmenting markets, targeting specific customer groups, positioning products and services, building sales forces, demonstrating products, pricing strategies, and building company reputation. The document also lists specific roles of marketing managers like developing marketing strategies and plans, managing the marketing mix, measuring success, and ensuring customer-focused decisions.