Don’t create multiple pages or sites with duplicate content.
There’s no shortcut to success. Building high quality site takes effort and time. However, we’ve seen that publishers who focus on their users instead of using quick and deceptive techniques are the real winners and experience long-term revenue growth and success in our network. For more information, check out Google Webmaster Guidelines and the policy section of the AdSense Help Center.
Posted by Lingjuan Zhang, AdSense Policy team