Sizes for Leaderboard, Skyscraper etc Google AdSense Ad Formats
…. and these are the same as IAB sizes
But which adverts perform best. Here’s an older article on expected % based on advertisements layout. This data is quite dated now. This 2007 article has all the banner sizes, plus location recommendations: Website Tips
Yahoo’s survey of best response positions:
Answer Response (%)
Leaderboard 27.32%
Right rail 9.28%
Left rail 7.88%
Embedded in content 44.66%
Below the fold 1.93%
Rotating positions 4.73%
Total 100%
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