…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.
There is more here, by Zach Wener-Fleiner, and for the pointer I thank a loyal MR reader.