The term “backstage” literally translates from English to mean “behind the stage.” Generally, it refers to the area of a performance venue (theater, concert hall, sports arena, etc.) that is not visible to the audience and is usually not accessible to them.
The direct area behind the main stage: This often houses stagehands, props, parts of the set, technical equipment, and maintenance areas.
The dressing rooms of the performers: Rooms where actors, musicians, and other performers change clothes, apply makeup, and prepare.
Green rooms or lounges for artists and crew: Areas where the performers and crew can relax and wait before, during, and after the performance.
Technical control rooms: Areas for the sound, lighting, and other technical crews.
Storage areas for costumes and sets.
Offices for the production management and other staff.
Catering areas for the personnel.
Beyond its purely spatial meaning, “backstage” can also be used metaphorically to mean:
Behind the scenes: In a figurative sense, “backstage” can describe the secret or non-public processes and decisions within an organization, project, or situation. One might talk about “what happened backstage.”
The private life of artists or public figures: It can refer to the private sphere and life away from public perception.
In summary, “backstage” primarily denotes the non-public working and resting area behind the stage at events, but it can also be used figuratively to mean “behind the scenes” or the private life of individuals.