You've learned a crafting discipline! Crafting has its own type of experience, which increases your discipline rating and unlocks more recipes. As your rating increases, you'll also earn bonus experience. Experiment in a crafting station's Discovery Pane to find new recipes.
You can have up to two active crafting disciplines. Talk to a discipline master to activate their discipline. Deactivated disciplines can be reactivated for a small fee, and no progress is lost when a discipline is deactivated.