Phone farming is a method utilized to create passive income by exploiting a mobile incentive program using multiple phones to perform the same action simultaneously. It usually involves exploiting paid-to-watch apps or other incentive based programs over dozens of phones in order to increase the total amount earned.
The term can also be applied to operations that orchestrate dozens or even hundreds of phones to create a certain outcome such as improving the ratings of a restaurant in Yelp or bumping up ASO in App Stores via 5-Star reviews.
Companies constantly make updates to their platforms in order to fight with phone farming, but it is almost impossible to prevent people from exploiting such services for their own benefit.