First, let me note that there's an annotated Table of Contents and a Glossary available for you to visit if you forget something.
That said...
The Federated Wiki is primarily a tool that supports a certain sort of collaboration, one that's a bit reminiscent of the legendary collaborations of the Republic of Letters 
, back when people mostly couldn't collaborate in real time when working on a shared idea. Instead, they would send letters back and forth.
Back in those days, if Gottfried Leibniz was corresponding with Étienne Baluze on a topic, he might respond to a letter of Baluze's with something like "I think the way you described our shared idea was sound, but what if we changed it in ways X and Y? Would it still be conveying the message you intended? Or am I missing something? Also, how about adding Z?"
That worked well. A lot of knowledge was built up by the back-and-forth of letter-writers. But it was slow. Nowadays we can be somewhat more efficient.
With the federated wiki, Leibniz can make a twin of Baluzel's page and edit it to show what he thinks it should look like, and then tell Baluzel about it in an email or on a Zoom call. That gives Baluzel a clearer understanding of what Leibniz intended.
The process of making a twin, editing it, and then informing your partner that "it's your turn now" slows things down, discourages "hot takes," and so produces more productive collaborations.
It's not the only way of collaborating. But it's **a** way that works pretty well a lot of the time.
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As a reader, you're not a participant in that process, but you get to read the result. While the federated wiki is primarily a creator's or writer's tool, it's also accessible to readers.
It's our hope you might want to become a creator – a contributor to the federated wiki – someday. (But there's no simple way to do that yet.)