# Mastodon [Mastodon (social network) - Wikipedia](https://en.wikipedia.org/wiki/Mastodon_(social_network)) [GitHub - mastodon/mastodon: Your self-hosted, globally interconnected microblogging community](https://github.com/mastodon/mastodon) Mastodon is a **free, open-source social network server** based on ActivityPub where users can follow friends and discover new ones. On Mastodon, users can publish anything they want: links, pictures, text, and video. All Mastodon servers are interoperable as a federated network (users on one server can seamlessly communicate with users from another one, including non-Mastodon software that implements [[ActivityPub]]!) [What is Mastodon? - YouTube](https://youtu.be/IPSbNdBmWKE)