How does PPC click fraud occur?
Fraudsters use a variety of methods to drain your ad budget. There are now companies who employ people to only click on PPC ads. Often, these are ad distribution partners with the PPC search engine. For example, if your ads run on Google Adsense, there may be hundreds of sites displaying your ads. The owners or managers of those distribution websites may be fraudulently clicking your ads. There are also automated tools that fraudsters employ. The third primary method of PPC click fraud is from competitors – either industry competitors or advertising competitors.