How to Save Up to 50% on Your PPC With Quality Score
Hubspot
AUGUST 19, 2013
I recommend that you focus on optimizing your Quality Scores, which is the metric most likely to lead to higher rankings, more clicks and leads, and lower costs for those actions. In 2009, Craig Danuloff crunched some numbers to show that a Quality Score of 10 could save you 30% on cost per click, or CPC.
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