The unique selling proposition or USP is a marketing concept first proposed as a theory to explain a pattern in successful advertising campaigns of the early 1940s. The USP states that such campaigns made unique propositions to customers that convinced them to switch brands. The term was developed by television advertising pioneer Rosser Reeves of Ted Bates & Company. Theodore Levitt, a professor at Harvard Business School, suggested that, “Differentiation is one of the most important strategic and tactical activities in which companies must constantly engage.

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