Overworld

The Overworld is the first and primary dimension in which all players begin in their Minecraft world. It is the dimension with the most biomes, blocks, and mobs, and where most players spend the majority of their time.

The Overworld is the only dimension created when the player creates a new world. The other dimensions (The Nether and The End) are not created until a player enters the corresponding dimension for the first time, usually using a nether portal or end portal.

A new world in Minecraft is generated through the use of a randomly generated seed, which is an integer used as a starting point for the world generation formula. The player can specify a seed or allow the game to generate one randomly.