Help Google Detect the Theme of Your Web Page

There are many on-page and off-page elements that affect your ad relevancy. Better targeted ads increase both your CTR and EPC. Here is how to optimize your ads:
 
Meta Tags
If there is NO CONTENT on your web page, the Google Mediabot will consider the Meta Tags while displaying ads. Meta tags have a considerable affect on the relevancy of your ads. It is advised never to leave this space empty. Also, try to make it as easy as possible for Mediabot to understand the theme of your web page.
 
Title Text
Google Mediabot gives good weightage to the keywords used in the Title text, which in turn gets reflected in your ads. Choose effective keywords for your Title text. Even the order of words in a keyword can affect the ads that are appearing on your web page. So, choose your keywords wisely.
 
Headings
Google Mediabot gives importance to the Heading text enclosed in <H1>, <H2> tags present in your web page. After Title text, here is another chance for you to dictate keywords to Google Mediabot. 
 
Boost Relevancy Artificially - Use Google's Section Targeting
Now, you can enhance Ad relevancy by using Google's Section targeting. Using this technique you can advise Google mediabot about the areas of your content which should be considered or ignored while matching the Ads with your content.
For more information on the same topic, visit:
https://www.google.com/support/adsense/bin/answer.py?answer=23168&topic=371
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