The Marketing concept is the philosophy that firms should analyze the needs of their customers and then make decisions to satisfy those needs, better than the competition. Today most firms have adopted the marketing concept, but this has not always been the case. In 1776 in the Wealth of Nations, Adam Smith wrote that the needs of producers should be considered only with regard to meeting the needs of consumers. To better understand the marketing concept, it is worthwhile to put it in perspective by reviewing other philosophies that once were predominant. After world war II the variety of products increased and hard selling no longer could be relied upon to generate sales. With increased discretionary income, customer could afford to be selective and buy only those products that precisely met their changing needs , and these needs were not immediately obvious.
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