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May 2, 2005

Google Ad Ranking System Tweaked

How are ads ranked at Google? Traditionally, it has been the ad's clickthrough rate (CTR) times its cost per click (CPC). Those with the highest resulting score came first. But Google Slightly Changes AdWords Ranking Algorithm from Search Engine Roundtable summarizes a WebmasterWorld thread about a relatively new change (and pretty much unannounced change). The clickthrough rate since January involves all the words of your ad copy, instead of solely being tied to the clickthrough rate of the particular word your ad is showing for. Changes in Google AdWords Ad Rankings Formula at WebmasterWorld has more.

Posted by Danny Sullivan on May 2, 2005 8:10 PM

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