It refers to an attempt made by an affiliate through bogus means to generate false revenue.

There are different varieties of fraudulent activities that individuals indulge in often. While few of these activities are automated others are not. In the case of automated activities, there will be an attempt to mimic the human visitors by false means. However in the case of non-automated activities, effort is required from humans to generate more registrations and more clicks. Affiliate frauds are easily detected by monitoring unusual patterns on activity logs. One way of minimizing these frauds would be to approve the affiliate applications from users individually. Having such an approach will help losing real affiliate and their productive efforts.