Mastodon is a micro blogging social network similar to Twitter. But it is based on open source code and a distributed network of servers. You find a suitable server to register an account on and have a handle such as @username@site. You can then follow people on that site locally or on other sites via a federated setup.
- Find a server via https://joinmastodon.org/
- Guide to Mastodon: https://github.com/joyeusenoelle/GuideToMastodon
- A Newcomer’s Guide to Mastodon: https://blog.natanox.de/1932/mastodon-guide/