google adsense.

This module provides web content providers with the means to earn revenue from visitors by displaying ads from Google AdSense™ advertising service on their sites.
Why should you use it:

• AdSense for Search and Drupal are incompatible as both use the 'q' query for different purposes. Using this module, you can display the search results in your site.
• Protects you from displaying more ads in a page than the maximum allowed by Google
• The module provides easy-to-use ad blocks.
• You can easily disable the ads for certain roles.
• Provides simple controls for troubleshooting the ads before going live with the site.
• If Google changes some minor details in the script in , your script can be updated site-wide just by upgrading the module.
• If you want to do ad revenue sharing, there's really no other option

Why shouldn't you use it:

• Strictly speaking, this module is not in compliance with the AdSense TOS, since you're not exactly copy-pasting the script code in your site. No one has ever reported being banned because of using this module, and Google knows of its existence, and seem not to mind.

The module is composed by the following sub-modules:

• AdSense core: Common module stuff. Required, but useless without an ad generator module.
• Managed ads: Ad generator that produces the same ad script code as currently generated by Google.
• CSE Search: Generates a Custom Search Engine form and the results page.
• Ads (old): Ad generator using the old script generated by Google upto 2008, but which is still supported by Google for displaying ads.
• Search (old): Generates a Search form and the results page using the old method which allowed the user to select the domain being searched.
• Revenue sharing (old): Enables the site owner to share the revenue between page authors in a configurable percentage. Only works with the old ad generator modules.
• Click Tracking: tries to track clicks on the displayed ads, usually failing to do so.

The module provides an API for selecting the publisher ID to be used to display ads.
Please read the README.txt that is included in the module for more details.