Minecraft wiki entry for Villager, associated text: Each villager can have a profession, indicated by their clothing as well as by the title at the top of the trading interface. A villager can choose their profession by claiming a job site block. When they go to work, they use their daily schedule to get to their claimed job site block. Some professions, like farmers and librarians, do other things. Farmers plant crops, and librarians can inspect bookshelves. If an adult villager do not have a profession (either they are unemployed or a nitwit), they will wander instead.