Photographic composition refers to the selection and arrangement of subjects or elements within the frame of an image. Good composition allows photographers to convey messages and emotions. There are several rules and techniques for effective composition, including using the rule of thirds to frame subjects off-center, visual cropping to remove unnecessary elements, and balancing different areas of light and dark. The document provides examples of different types of compositions like portraits, landscapes, and action shots, and gives tips for techniques like filling the frame and changing angles for portraits.