Photo contests are competitions where photographers submit their best images to be judged based on various criteria, such as creativity, composition, and technical skill. These contests can be organized by individuals, organizations, or online platforms, and they often have specific themes or categories, like nature, portrait, or street photography. Winners may receive prizes, recognition, or opportunities for exposure in galleries or publications. Participants in photo contests typically need to follow certain rules, such as submission deadlines and image specifications. Many contests also allow for public voting, adding an interactive element. Popular contests include those hosted by National Geographic and The Sony World Photography Awards.