"Mastodon is a decentralized social network that uses standard interoperability protocols and is completely [FOSS]. What this means is that anyone can run a Mastodon server, and the users of those servers can talk to each other. More than that, non-Mastodon servers are also part of this network if they conform to the same protocols. This means that Mastodon is more future-proof than Facebook or Twitter: Even if Mastodon-the-software falls out of fashion, the network can be simply continued by other interoperable software. You don't have to tear out your entire social graph to have all friends migrate to something new if that happens. Furthermore, Mastodon allows self-determination and control. When you run a server, it's yours. Your rules, your community, hosted on your hardware... you don't depend on anybody, definitely not on a [Silicon Valley headquarters]."
Find me at @firstname.lastname@example.org