This mod awards a small amount of experience each time you craft an item in the world. It's like melting an item in a furnace.
The more you craft 'high-tier items', the amount of experience you gain increases slightly.
List of high-tier items:
-Diamond gear
-End crystal
-Golden apple
-Potion arrow
-Conduit
-Enchanting table
-Netherite ingot
-Cake
-Lodestone
-Beacon