If you want to find out more about an instance on the Fediverse, the easiest way to do it is through - just put the instance domain name after "".

It works for all kinds of Fediverse sites including Mastodon, Friendica, PixelFed, PeerTube, Write Freely etc.

Some examples:

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Mastodon is a microblogging site that federates with most instances on the Fediverse.