Kit Rhett Aultman@KissAnne Ah, it's short for "Fediverse" (which is short for "federated universe"), it's basically the backbone a number of different social media applications run on. Mastodon is one of them and the most famous, but there are others, too, such as ones for music sharing or for video sharing.
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All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.