Darknet is an overlay network that can only be accessed using specific software, configurations, or authorization.
It is part of the deep web, because its contents are not accessible through search engines but it is something more, it is anonymous.
It hosts anonymous websites. Yeah, you wouldn’t know who the owner is unless he explicitly reveal his information. It offers full anonymity to users too.
Darknet anonymity is usually achieved using an ‘onion network’.
I’m sure you have cut an onion once in your lifetime and you have been crazy about the number of layers it has, same happens when you use an onion network. There are number of encryption layer that hides your true identity.