Photo challenges are creative contests where participants take photographs based on specific themes or prompts. These challenges can be found on social media platforms like Instagram or Facebook, encouraging photographers of all skill levels to showcase their work. Themes may vary from nature and architecture to emotions and colors, allowing for diverse interpretations. Participants often share their images using designated hashtags, making it easy to find and engage with others' submissions. Some challenges last for a day, while others may span weeks, fostering a sense of community among photography enthusiasts. These activities can inspire creativity and improve photography skills.