A click farm is a form of click fraud, where a large group of low-paid workers or bots click on paid advertising links for the click fraudster (click farmer). The workers and bots click the links, surf the target website for a period of time, and possibly sign up for newsletters prior to clicking another link. It is extremely difficult for an automated filter to detect this simulated traffic as fake because the visitor behavior appears exactly the same as that of an actual legitimate visitor.
Fake likes generating from click farms are essentially different from those arising from bots where computer programs are written by software experts. To deal with such issues, companies such as Facebook are trying to create algorithms that seek to wipe out accounts with unusual activity (e.g. liking too many pages in a short period of time).[2]
References
- Click Farm, wikipedia.org