Click farm is an organized group of low-paid workers employed to click on particular parts of web pages, especially approval buttons in social media as a way of making businesses seem popular.
Research suggests that over a third of consumers regularly check ratings and reviews before they choose to buy something online. The growing significance of this virtual seal of approval for enhancing sales has, it seems, unleashed a rather unscrupulous business activity. Rather than having to wait for users to register their approval of your products and services, why not simply buy a whole shed-load of 'likes' and instantly demonstrate your popularity? To do this, you employ the services of a click farm.
Hundreds of companies have sprung up in the last couple of years specializing in click farming, delivering bundles of online approval to businesses requiring a quick and dirty way to boost their popularity.