“Deep Web,” “Darknet,” “Dark Web,” and “Darknet Markets” from Wikipedia

The Internet is a network, or more accurately: it is a network of connected networks.
The World Wide Web is a cyberspace that exists upon the Internet… or “via”(?) the Internet. – (I don’t think our language, our human English, has words to accurately describe how networks and cyberspaces are related; for example, your brain is a neural network, or, more accurately, it is a network of networks; your consciousness (your thoughts, your memories, your emotions… your “content”(?)) exists “upon”(?) your brain. You see?: our language doesn’t really describe this.)
The Deep Web is content of the World Wide Web that is not accessible through standard search engines.
A darknet is a network that is built on top of, or overlaid upon, the Internet, and to which access is restricted, requiring, for example, special software or authorization.
The Dark Web is content that exists on darknets.
A darknet market is a marketplace that exists on a darknet.

The Internet and darknets are networks; darknets overlay the Internet.
Considering the World Wide Web as content on the Internet, the World Wide Web can be divided into two subsets: the Surface Web and the Deep Web. The Surface Web is content that is accessible through standard search engines. The Deep Web is content that is not accessible through standard search engines, and it is much, much larger than the Surface Web, but it is mainly composed of information in databases (databases are generally not searchable through standard search engines). However, some content of the Deep Web is not accessible by standard search engines because it exists upon darknets, and that content is called the Dark Web.
The World Wide Web is the superset; the Deep Web is a subset of the World Wide Web; the Dark Web is a subset of the Deep Web; and darknet markets form a subset of the Dark Web.
⁓The Voice before the Void

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“Deep web (search)”

Wikipedia

This article is about the part of the World Wide Web not indexed by traditional search engines. For the part of the World Wide Web which exists on Darknets, see Dark Web.

The Deep Web, Deep Net, Invisible Web, or Hidden Web are search terms referring to the content on the World Wide Web that is not indexed by standard search engines. Computer scientist Michael K. Bergman is credited with coining the term in 2000.

1. Terminology conflation

The first conflation of the terms came about in 2009 when Deep Web search terminology was discussed alongside illegal activities taking place on the darknet Freenet. Continue reading