A configuration file contains all blueprint- and build layers. It must be assigned to a TileWorldCreatorManager component in the scene.
There are two different layer types:
Blueprint Layers
Build Layers
Create a new configuration:
Right click in the project view and select:
Create / TileWorldCreator / Configuration
Blueprint Layers
A blueprint layer holds all cell informations which where created either by painting or by generators/algorithms. You can use multiple layers, generators and modifiers to build your tile world with different world biomes, heights etc.
Layers are executed from top to bottom including their modifiers. So always make sure the order is correct when creating a blueprint stack.