Mastodon is a "decentralized Twitter". Microblogs scattered across many independent servers interconnected in one network. The closest analogue is regular E-mail. You can register on any server and subscribe to messages from users of any other servers.
Changes (since v2.9.0)
New functionality
- Added API for moderation.
- Added audio download.
- Added short_description and approval_required to GET method for /api/v1/instance.
Changes
- Domain blocking now automatically supports subdomains.
- Nanobox configuration changed.
- In the upload form, the camera icon has been changed to a paperclip icon.
Removed
- Removed resource-intensive counters from the federation page in the admin interface.
Source: linux.org.ru