I want to be clear that the audience that is discussed here is not a group of people who have any involvement in the creative process of the scenography work, but instead participate in the finished product.
The scenery will help the audience to understand how they relate to the play work.
The zoning of the space usually places the viewers interacting, in a more or less evident way, with elements which are distributed around the performing space: the stage, seats, or some objects. The illumination of certain areas and/or the addition of sound, helps to direct attention to the areas of interest. At other times, the actors themselves will lead the people to consider the position they should take. Finally, the very architecture and topography of the place has the power to inform the audience.