AdSense Heat Maps

www.google.com/adsense/support/bin/answer.
py?answer=17954&topic=8970
Heat maps, like the one shown in Figure 17-1, are maps that show the
best placement for your ads on a given Web site. The link here leads to
Google’s suggested best placement. However, it only takes certain factors
into consideration. For example, this site has no consideration for scrolling
Web pages.
Another resource for heat maps that might be more useful is
www.vaughns-1-pagers.com/internet/google-heatmap-2.htm
These heat maps show some of the different variations that you might need
to take into consideration due to the unique nature of your Web pages —
variations like scrolling pages and different navigational structures. Just
remember, this isn’t an exact science. Test everything before you make any
final decisions about what works best on your particular site for your particular
audience.