What is the origin of the idiom "behind the scenes" and when to use it?

The idiom "behind the scenes" originated from the world of theater and stage performances, where it refers to the areas and activities that occur out of sight of the audience. It denotes the backstage area where actors, crew members, and technicians work together to make a production successful. Over time, the phrase has been adopted metaphorically to describe the hidden or less visible aspects of any event, organization, or process. It is used to implie that there is more happening than what is readily apparent to the public or observers, providing insight into the inner workings, complexities, and effort involved in achieving a desired outcome.