Makes all normal villages that would have generated become abandoned. If you run "/locate structure village_plains" or whatever (and it is a normal village) and teleport to it, it will be abandoned.

You will not get camels in the abandoned desert villages, making them unobtainable (as far as I'm aware).

Doesn't modify villages that would have generated as abandoned villages.

See also: https://www.planetminecraft.com/data-pack/no-villages/ to remove normal villages.
See also: https://www.planetminecraft.com/data-pack/no-abandoned-villages to remove abandoned villages (but not the normal→abandoned ones from this datapack).