The Net Ocean (ネットの海 Netto no Umi?) is the world where the Appmon come from. It is part of the backstory of Digimon Universe: Appli Monsters.
The Surface Web is the most surface part of the Net Ocean.
The Deep Web is under the Surface Web.
The Dark Web (ダークウェブ Dāku Webu?) is under the Deep Web. It is where Leviathan lives.
The Appmon Academy (アプモン学園 Apumon Gakuen?) is the main setting of Appli Monsters: Appmon Academy!!. It is a school for Appmon.
Notes and references