Decentralization is an important internet issue these days (or basically always) and also a reason why we chose an independent hoster for RoRganize.it.
To show support and raise awareness of decentralized alternatives we now also have Mastodon fields on user and group profiles.
There are many different Mastodon servers you can create an account on, that's why your handle consists of a username and the name of the server you registered on. If you're interested in the wider networks of decentralized social media, check out fediverse.party
Big thanks to @Seunadex for taking care of the implementation!