What viewers end up seeing in the picture is entirely up to you. Aside from choosing your camera settings and when to click the shutter, you get to decide where to point your lens. Certainly there are many ways to achieve better photos, but what helps turn your ordinary snapshot into a compelling work of art is putting a lot of thought into the composition. The main purpose of composition is to guide the viewer's eye to your image, and to help them understand your story. Understanding the principles of composition in photography and knowing how to lead your viewer's eye to your subject or the focal point you want to them to see, require a knowledge of your camera tools and a depth of understanding of your vision.