Wikimedia Commons is a free media repository that allows users to upload and share images, audio, and video files. It is part of the Wikimedia Foundation, which also operates projects like Wikipedia. The platform aims to provide a centralized space for freely usable media, making it accessible to everyone. Users can contribute by uploading their own media or by sharing files that are in the public domain or under free licenses. All content on Wikimedia Commons can be used by anyone, provided they follow the licensing terms. This promotes collaboration and the sharing of knowledge across the globe.