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.
And, web advertising continues to take over US marketshare:
Spending on digital advertising—which includes social media and mobile devices—is expected to rise nearly 17% to $50 billion in the U.S. this year. That would be about 28% of total U.S. ad spending. Just five years ago, digital accounted for 16%.