Incerase Cpc and Your adsense earnings.Using the Google AdSense Section Targeting will help the ads being displayed be more releveant to the content on your pages. This plugin lets you determine the areas of your site that will be used to select ads. You can find out more about Section Targeting at the following URL:
What is section targeting and how do I implement it?
For more details visit plugin homepage
Adsense Targeting