Where I work we are told constantly: "Be sure to take notes on what you do, as you might have to do it again." As a result, every time we learn something interesting or something arcane, we document it. We jot it down, add keywords, clean it up, share it and make it available for our use in the future. Opinions get added to previous notes. Things that are no longer correct get corrected. The result is that we have a group memory that has the potential to transcend our individual careers.
Now expand on that idea. Imagine if the entire human race were to start taking excellent notes on everything around them. Imagine if all those notes were collected and shared for everyone's use. That is what Everything represents: The World's Largest Knowledge Base.
Tidbits of data and experiences can be shared for everyone so that what we know can be made available for everyone to build upon.
Oh, and it doesn't hurt to find something without having to kill yourself searching.
I admit that I'm a bit intimidated by adding a writeup regarding E2 itself, but this is Something Important.