Quality Score may be a variable employed by Google, Yahoo! (Called Quality Index), and Bing that may influence each the rank and price per click (CPC) of ads.
To determine the order during which ads are listed, every ad has the subsequent formula run against it: bid * Quality Score. Ads are then listed in following order supported the results of that equation. The precise weight of Quality Score versus bid has not been disclosed by any of the most important search engines, and every company has declared that they reserve the proper to repeatedly change their ranking methodologies.
In late 2008, Google disclosed that Quality Score was accustomed confirm that as it'd show on top of organic results, which a top quality score might truly cause ads to leap over ads with lower quality scores that might otherwise not benefit that distinguished placement.
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