Composition refers to the organization of pictorial elements in a frame. Every image should have a single story to tell. The purpose of composition is to direct your viewer's eye to the central point or "story" in your scene. Regardless of the particular subject, composition of the frame is important. To present a picture to your audience that is unified, shows the relationship between the elements in the frame, and is aesthetically pleasing. Everything in a frame is important, not just the subject!