An exobrain, or "second brain", or "brain dump" is something like a public wiki where you can keep your bookmarks, notes, ideas and thoughts.
Other people can search in your exobrain without having to physically interact with you. The point is not to avoid physical interaction altogether, but to scale collaboration and knowledge exchange with other people.

It also allows for quicker iteration in writing blog posts or developing thoughts - I can just quickly publish it here, share it gradually, and receive immediate feedback.

This knowledge base is made of thematic Asciidoctor files.
In some cases ( like notes and exobrain ) there is a thematic directory of files.

Notes are very simple: just a h2 followed by whatever.

Journaling complements the synchrinization model. Otherwise distributed editing would get messy, cause of conflicts.

This exobrain is made available in a number of ways and formats.

At the moment the only consumption method available to the public is via the Web2.0 interface. AKA my personal website.

You can learn more about this system exploring the notes about itself here or on the Web2.0 interface.

If you still want more, here are some web resources about exobrains and similar stuff. Good luck, see you in the rabbit hole.