Video portals bear counters that register the number of views,thus reflecting the success of the piece. This data can bear economic implications, since with some online advertising campaigns that use videos, and the portals can charge based on the number of registered views. And one of the problems with the fraud that exists in this area is that of "bots",computer programs that replicate the behavior of an Internet user, and which can therefore artificially increase the number of views.
Source: phys.org