Billions of dollars are flowing into online advertising. But marketers also are confronting an uncomfortable reality: rampant fraud.
About 36% of all Web traffic is considered fake, the product of computers hijacked by viruses and programmed to visit sites, according to estimates cited recently by the Interactive Advertising Bureau trade group.
So-called bot traffic cheats advertisers because marketers typically pay for ads whenever they are loaded in response to users visiting Web pages””regardless of whether the users are actual people.