Google Adsense Section Targeting

[Princeton]

I recommend "section targeting".
Not all sites need it though.

The idea is that Google will display ads according to keywords found within the targeted section(s). If you have a site with a lot of "junk" (ie, widgets, features, etc) than section targeting will help.

Google Adsense success only happens when ads displayed are relevant to the page subject. (The more relevant the ads are to subject the more likely your readers will click on them - CTR increases.)