The dark web and deep web are not the same — all sites on the dark web are technically part of the deep web, but much of the deep web is not part of the dark web. The deep web is simply the part of the internet that isn’t indexed by search engines, such as email inboxes, banking portals, or any site that requires authentication or a password.
Unlike regular deep web sites such as your email account, the dark web is inaccessible unless you have special tools or software like the Tor browser. Some even say that the real dark web requires an invitation to participate.