Google admits that more than half of its ads aren’t even viewed

Online advertising is a fickle thing. It accounts for 20% of the ad industry’s total spending, and over 90% of revenue for the internet giants Google and Facebook. That said, no one seems to have any idea whether it actually works. That uncertainty reached a new high this week, as Google announced that 56.1% of ads served on the internet are never even “in view”—defined as being on screen for one second or more. That’s a huge number of “impressions” that cost money for advertisers, but are as pointless as a television playing to an empty room. This is not a big revelation. The web metrics company ComScore reported last year that 46% of online ads are never seen. Spider.io, an ad fraud company acquired by Google in February, has pointed out that a large portion of ads are “viewed” only by robots, revealing that one botnet of 120,000 virus-infected computers viewed ads billions of times, running up the tab for advertisers without offering them the human eyeballs they sought.