Now I get what you mean with the SSB. So it’s just a personal Facebook or does it have more applications than that?
There are other applications, such as ssb-chess, git-ssb (Git over SSB) and an NPM alternative. More are listed here, but the biggest apps in the ecosystem are the ones in the tutorial. That’s not to say it’s the only thing SSB does, though.
Good to know! I just miss an app purely for private messaging. I guess it’d be useful in cases of censorship or vigilance.