system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Explain deep web

Please explain deep web, I know some of the basic stuff, but that's it.
I'm so curious! 

And btw it's not because I want to go to deep web, I just want to know :)
gpt
So there's the web you're on now (surface web) where everything is indexed and fairly simple to find with standard browsers and search engines.  The deep web is the stuff that's not indexed and takes some special software and, often, some layer of security, to access.

Think of it like this:

Say there's a bookshelf in front of you and you can browse all the titles and access any book you want.  But *behind* those books are a multitude of other books that you can't see.  Maybe it's because they belong to someone who chooses not to share them, or maybe they are banned books that you typically don't have access to, or maybe they are being hidden for sharing with a specific person or group, or maybe they are just being stored back there.  Whatever the case, you can't see them unless you put on a special pair of glasses which allows you to see past the books on the outside of the shelf.

Accessing the deep web is less like accessing a forbidden spooky wasteland as some may describe it (though there is some freaky stuff out there) and more like accessing the stuff you aren't necessarily intended to be able to see, for whatever reason (intentional or not, illegal or not, accidental or not).