Publishers participating in the AdSense program are required to adhere to the following policies, so please read them carefully. If you fail to comply with these policies, we reserve the right to disable ad serving to your site and/or disable your AdSense account at any time. If your account is disabled, you will not be eligible for further participation in the AdSense program.
Invalid Clicks and Impressions
Publishers may not click their own ads or use any means to inflate impressions and/or clicks artificially, including manual methods.
Publishers may not ask others to click their ads or use deceptive implementation methods to obtain clicks. This includes, but is not limited to, offering compensation to users for viewing ads or performing searches, promising to raise money for third parties for such behavior or placing images next to individual ads.
Publishers may not place AdSense code on pages with content that violates any of our content guidelines. Some examples include content that is adult, violent or advocating racial intolerance.
AdSense publishers may not display Google ads on webpages with content protected by copyright law unless they have the necessary legal rights to display that content.
AdSense publishers are required to adhere to the webmaster quality guidelines.
Google ads may not be placed on pages receiving traffic from certain sources. For example, publishers may not participate in paid-to-click programs, send unwanted emails or display ads as the result of the action of any software application. Also, publishers using online advertising must ensure that their pages comply with Google's Landing Page Quality Guidelines.
AdSense code may not be altered, nor may the standard behavior, targeting or delivery of ads be manipulated in any way that is not explicitly permitted by Google. For instance, clicking Google ads may not result in a new browser window being launched.
Publishers are encouraged to experiment with a variety of placements and ad formats. However, AdSense code may not be placed in inappropriate places such as pop-ups, emails or software. Publishers must also adhere to the policies for each product used.
Sites showing Google ads should be easy for users to navigate. Sites may not change user preferences, redirect users to unwanted websites, initiate downloads, include malware or contain pop-ups or pop-unders that interfere with site navigation.
Competitive Ads and Services
In order to prevent user confusion, publishers may not display Google ads or search boxes on websites that also contain other ads or services formatted to use the same layout and colours as the Google ads or search boxes on that site. Although you may sell ads directly on your site, it is your responsibility to ensure that these ads cannot be confused with Google ads.
Google Advertising Cookies
AdSense for content: Up to three ad units and three link units may be placed on each page.
AdSense for search: A maximum of two Google AdSense for search boxes may be placed per page. Also, a single link unit or a search box, but no other Google ads, may be placed on pages with AdSense for search results. Queries must originate from users inputting data directly into the search box and cannot be modified. This includes pre-populating the search box with terms or hard-coding direct links to search results pages. AdSense for search code may not be integrated into any software application such as a toolbar.
This information is provided by Google AdSense. For more information have a look of Google AdSense Program Policies