(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 cost-per-click savings associated with above-average Quality Score keywords is today worth up to 200% more than it was just 4 years ago! Here’s a quick summary of the relationship between Quality Score…

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