How Google Calculates Adsense Ad Position
If you have been in this business for a while you probably already know this. Google has posted a special section on their Adwords Page — “Adwords for Content” (to us thats Adsense.)
“AdWords multiplies Quality Score (QS) and the maximum CPC (Max CPC) to reach an Ad Rank for each ad”
In English that means the highest bidder could actually show up at the bottom — not the top.
Recently I added an Adsense unit to the footers of one of my sites. I gave them a special channel so I could track them. Guess what, it turned out they paid exceptionally more per click than the ads on the top did. This may not always be the case, but I recommend you try it out if you haven’t already.

What is the Quality Score?
Comment by anty — December 20, 2005 @ 3:14 pm
From Google Adwords Help Center —
“This is the basis for measuring the quality of your keyword and determining your minimum bid. Quality Score is determined by your keyword’s clickthrough rate (CTR), relevance of your ad text, historical keyword performance, the quality of your ad’s landing page, and other relevancy factors.”
Comment by Andrew — December 20, 2005 @ 8:37 pm
uh, thx
Comment by anty — December 21, 2005 @ 2:24 am