This document provides an introduction to revenue management. It discusses the history of revenue management in industries like airlines, car rentals, and hotels. It defines common terms like selling the right product to the right customer at the right time and price. It also discusses what revenue management is and is not, such as it is about maximizing revenue through business mix decisions rather than finance or reservations. The document shows how a hotel can optimize its business mix across customer segments to improve profits and cites a study finding hotels with revenue managers earn 4% more revenue on average. It encourages hiring a dedicated revenue manager to boost a hotel's bottom line.