Tutorial:Villager farming

All you need to breed villagers in any update after 1.14 is a big enough space with 3 beds and give each villager enough of the right food; then they create a baby villager.

Farming villagers can be beneficial for many reasons. If the player has a villager trading hall, then the player must fill it with villagers and replace the ones that the player discards. It is difficult to do this through kidnapping villagers alone, so having an artificial breeder can be very helpful.

Another use is for an iron golem farm as they work with a certain number of villagers; see Tutorial:Iron golem farming.