The only and the most effective way of finding out whether impression fraud is being committed are by accessing how many impressions a specific keyword is receiving. If there is an unexpected spike in the impressions, which would mean you might be a victim of impression fraud. However, impression fraud is not easy to identify as a single advertiser has thousands of keywords and the targeted keywords are easy to detect only if there is quite a granular campaign structure.
One example of a site with a complex campaign structure is Ticketluckwhich is a popular ticket resale marketplace. It offers tickets for all kinds of live events; including sports, concert and theater . With such an extensive working of a website, impression fraud is not easy to detect.