Set decoration is the process of enhancing a film, television show, or theater production by adding visual elements to the set. This includes selecting and arranging furniture, props, and other decorative items to create a specific atmosphere or reflect the characters' personalities. The goal is to make the environment believable and engaging for the audience. Set decorators work closely with the production designer and art director to ensure that the set aligns with the overall vision of the project. They consider factors like color, style, and historical accuracy to create a cohesive look that supports the story being told.