Minecraft wiki entry for Advancement, associated text: The advancement system involves several trees composed of advancements, each tree beginning with a root advancement from which several branches diverge. By clicking and dragging, the player can view different branches of an advancement tree. Each tree is categorized into different tabs (which are defined by the root advancements). Tabs are not visible if no advancements in the tab have been unlocked. There are currently five tabs in vanilla Minecraft: