A seed changes what your Minecraft world will look like. In this guide we will go through how to start a brand new world with a new seed.
If you want to change your world generator itself, you can read our how to guide about how to change your terrain generator.
Using the World Manager
You can create a new world using a custom seed using the World Manager, all you need to do is give it the seed and it will handle all of the server configuration for you, so you don't have to. You can learn how to use the World Manager to create a new world by checking out our article about:
How To: Create a New World with the World Manager
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