Fraud traffic is considered as a violation of Revenuehits regulations and includes bot and non-organic traffic. 

Those actions can cause an increase in advertiser's expenses or increase in publisher revenue in an artificial way. 

Clicks and conversion must result from genuine human traffic.

Our automated system utilizes intelligent filters that differentiate between proper user's activity and any type of activity that could be categorized as invalid, such as bots or any automated traffic sources. 
If you experience a significant gap in the number of impressions or clicks from your expected amount, we strongly recommend that you check your traffic sources validity.