by Don Davis
Search marketing firm Kenshoo also reports cost per click on paid search ads increased, going up 25% over last year for its clients on Black Friday. Total search advertising spend for Kenshoo clients increased 48% year over year on Black Friday, and revenue driven from search advertising increased 29%. But the higher cost per click resulted in return on ad spending decreasing 13% on Friday, says Kenshoo, which compared clients it served both this year and in 2010.
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