Jul 13
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(Property of HBO) The high-level relationship between Cost-Per-Click and Quality Score is well known: the higher your Quality Score, the lower your cost per click. Earlier this year, I published some research data showing how, as average Quality Scores have drifted lower over the years, the… Please visit Search Engine Land for the full article.
Originally posted here:
All Hail Quality Score – King Of The AdWords KPIs!