Mastodon - Fediverse (Patreon)

Is anyone here on Mastodon, or the fediverse in another way? Today is the first time I've heard of "fediverse" though I have heard of Mastodon. I still don't know what Mastodon is, but from what little I've heard it sounds something like Discord. I plan to check it out, figure out if there is anything there for me.

If you are on Mastodon are there any servers dedicated to the love of Super Heroines?