Quote:
Originally Posted by Henry  The first Adsense unit on a page displays the top paying ads. So if you want to maximize Adsense earnings, make sure your "money maker" ad block appears before any other Adsense block on the page.
This is well known but there are some people who just recently found this out (like me).
Ref: Inside AdSense: First impressions count |
AdLinks are most profitable for me - 50% of all AdSense income.