Marketing Information System ( MkIS ) The business function of marketing is concerned with the planning, promotion, and sale of existing products in existing markets, and the development of new products and new markets to better serve present and potential customers. Marketing information includes all facts, estimates, opinions, guidelines, policies and other data which is necessary for taking marketing decisions. This information may be collected from both internal and external sources: from customers, competitors, company salesmen, government sources, specialized agencies, so on. This information is analyzed. Then, it is supplied to the marketing managers. The marketing managers use this information for taking marketing decisions. ©
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