A Little AdWords Quality Score Sluething
July 17, 2007
Bill Slawski over at SEO by the Sea recently unearthed 3 patents filed by Google that map out the methods AdWords uses to determine the quality of an advertisement. As expected, the patents are mind-numbingly dry, but still we found them illuminating since the PPC Hero Team is constantly trying to breakdown the AdWords quality score to the most minute detail. As we are always looking to be of service to you, I read through these patents so that you wouldn’t have to. Here are the summaries and major points (from what I could decipher):
The first patent discusses predicting ad quality: An advertisement’s relevancy to a user’s search is determined by its performance and displayed accordingly. However, I find this statement of interest, “applying an algorithm to the retrieved past quality scores to provide a value that predicts the future quality of the advertisement.” This means that AdWords determines the likelihood that an advertisement is good by blending your past, present and predicted performance.
We all know that AdWords filters advertisements by the keywords in any given query. And we know that if your advertisement has performed well in the past, then you’ll be rewarded with a lower cost-per-click (CPC) and a higher ad rank. However, this patent states that AdWords also takes into account your advertisement’s future performance as well.
The second patent discusses ad filtering, ranking and promotion: How does CTR*CPC+K.sub.1*QP.sub.1*CTR-K.sub.2*QP.sub.2*CTR affect your AdWords performance? Good question! But I can’t answer it. This equation details how an advertisement is ranked without factoring in click-through rate.
This patent describes, “a method, comprising: obtaining a first parameter (QP.sub.1) associated with a quality of an advertisement among a plurality of advertisements with at least one other parameter to filter, rank or promote the advertisement among the plurality of advertisements.” Basically this means that AdWords uses another parameter other than CTR to determine an advertisements’ rank and promotion. But the first parameter (QP.sub.1) is never defined so it is difficult to dissect this ranking method effectively.
However, minus the definition of the illusive QP.sub.1, I can tell you that rank is determined by your bid, click-through rate and overall quality score. This information is nothing new, but I wonder what the QP.sub. 1 could be? Could this be the attributes of the quality score minus the CTR? Perhaps an actual human review that ranks the relevancy of each advertisement?
The third patent discusses how user behavior may influence your quality score: There are a number of actions factored into a user’s interaction with paid listings, and here they are:
- The time an advertisement selection is displayed
- How many ads are selected before & after a given advertisement
- How many search results are selected before & after a given advertisement
- How many other types of results are selected before & after a given advertisement (ex: map)
- How many documents are viewed before & after a given advertisement
- How many different search queries were performed by the user before & after the given advertisement was selected
- How many times a user selects the same given advertisement
- Was the given advertisement the last one selected for the given query
- Was the given advertisement the last one selected during the user’s session
These are certainly the “murkier” attributes of the quality score. When managing your PPC campaigns it is difficult to pander to every attribute to the quality score (especially if there are going to be so many!). How much weight does each attribute of the quality score carry? You’ll be able to throw in your two cents on this topic! Watch the blog tomorrow because we’ll be taking a survey to see what you think.
Update: We want to know your opinion! Complete our quick Quality Score Survey.
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