So I discovered that Knowfox can be used on the main website by registering an account there. I did so. One thing that is noted is that everything is private b

So I discovered that Knowfox can be used on the main website by registering an account there. I did so. One thing that is noted is that everything is private by default. What does that actually mean? Even on the github, I couldn't find any kind of description of what "private" means? Is it e2e encrypted? The keys are saved somewhere on my device? When I create a new concept, I see it has a relations config at the bottom of the concept creation page. How do I use the relations that I define there?