Placing ads on your website using Google Adsense is easy you just need to copy the javascript code that provided by Google and viola ads starting to show up on your website. Related ads with your website content usually show up after a few hours after you put the Adsense code on your website. There is some trick to improve this related ads to be more related to your content.
For example you have a blog with a possibitity for visitors to put comment on your articles, since Adsense shows related ads to your website content there is possibility that the ads being shown is actually more related to the comment’s keywords instead of your original blog post’s keywords.
To get the ads to be more related to your blog articles you can emphasize your content by adding section targeting HTML tags. These section targeting tags will provide Google Adsense’s crawler information of which part of your website is the main content.
The HTML tags to emphasize a page section take the following format:
You can also designate sections you’d like to have ignored by adding a (weight=ignore) to the starting tag:
With these tags added to your HTML code, your final code may look like the following:
Section targeting
This is the text of your webpage. Most of your content resides here.
Source: http://www.google.com/support/adsense/bin/answer.py?answer=23168
