The “dark web” is a subset of the “deep web”. The deep web is only the part of the web that is not accessible to search engines. You won’t find these websites when you use a search engine like Google or Bing, but they are otherwise normal websites.
The “dark web” is a smaller part of the deep web that cannot be accessed without special software.
The dark web is a decentralized network of websites that attempt to make users as anonymous as possible by routing all of their communications through multiple servers and encrypting them at every step.
The darknets that make up the dark web include small peer-to-peer friend-to-friend networks, as well as large popular networks such as Tor, Freenet, I2P, and Riffle operated by public organizations and individuals.
Dark web users refer to Clearnet as the ordinary web because of its unencrypted nature. The Tor or onionland dark web uses the onion routing traffic anonymization technique under the network top-level domain suffix that is “.onion”.