From Ben Edelman's blog:
"When an advertiser buys a pay-per-click ad and subsequently makes a sale, it's natural to assume that sale resulted primarily from the PPC vendor's efforts on the advertiser's behalf. But tricky PPC platforms take advantage of this assumption by referring purchases that would have happened anyway. Then, when advertisers evaluate the PPC traffic they bought, they overvalue this "conversion inflation" traffic – leading advertisers to overbid and overpay.
In this piece, I show Google and its partners still covering popular sites with PPC advertisements promoting those same sites.
..."
http://www.benedelman.org/news/010510-1.html
Screenshots:
http://www.benedelman.org/images/google-jan10/whenu-mediatraffic-namimedia-clickforensics-localpages-infospace-google-continental-010110.html |
