A market consists of sellers and buyers where transactions can potentially occur. Marketing management involves choosing target markets and attracting, retaining, and growing customers through superior value. The marketing concept holds that organizational goals are met by understanding customer needs and satisfying them better than competitors. It has four pillars: targeting specific markets, understanding customer needs, integrating marketing functions, and achieving profitability. Customer retention marketing aims to convert occasional buyers into loyal, long-term customers through communication, service, listening to customers, loyalty programs, and connecting customers.