The digital advertising ecosystem is home to several different “flavors” of fraud. Fake sites made to look legitimate run real ads, but to audiences made up entirely of click farms and/or bots. These entities are programmed to visit certain sites and click on its ads to artificially drive up traffic. Using the same type of machine-learning technology that powers performance, Rocket Fuel prevents ads from being served on these fraudulent pages. Through real-time data points such as the site itself, user agents, user history, and conversions, Rocket Fuel identifies the "bad actors" and blocks them at the source.