Minecraft wiki entry for Advancement, associated text: First look at advancements; Dinnerbone showcasing usage of the interface (click to play).
"Tabthulhu".
The advancements screen when no advancements have been completed or unlocked.
Advancement "A Balanced Diet".
Advancement "A Complete Catalogue".
Advancement "Monsters Hunted".
Advancement "Two by Two".
Advancement 1.12-1.17 "Adventuring Time".
Advancement 1.18+ "Adventuring Time".
Advancement "A Furious Cocktail".