OpenStreetMap is a website that lets people map and share information about the world. It is like a giant online map that people can zoom in and out of, like Google Maps. But instead of just seeing buildings, roads, and places, people can add their own information too. People can add information about buildings, places, roads, paths, and even things like restaurants or parks. Then people can share this information with other people or use it to help them find their way around.