Revenue management is a technique used to maximize profits by understanding basics like revenues, costs, and profits. It started in the late 1970s when the airline industry in the US was deregulated and American Airlines introduced a discounted pricing system based on flight demand. This concept expanded to hospitality and can now be applied to any product using dynamic pricing, inventory management, restrictions, and tracking customer and market data. Revenue management connects business data to concepts of demand, supply, pricing, and uses data analytics to leverage inventories at both the macro and micro levels.