Don’t create multiple pages or sites with duplicate content.
We encourage you to create high quality sites rather than a large quantity of sites. Focusing on one site and making it richer in information and authentic in content not only benefits users, but also helps you win more of them. When users are browsing online, they want to find what they’re looking for quickly and easily without combing through endless multiple pages, subdomains, or sites with substantially generic or duplicate content. If you have pages or sites that are similar in content or template design, consider consolidating the pages or sites into one.
Some publishers create sites that appear to offer a product or service, but instead trick users into navigating through several pages and viewing ads. This results in a negative user experience, and causes your site to be perceived as untrustworthy. Use keywords appropriately and in context with your content and make sure users are able to easily navigate through the site to find what products, goods, or services are promised.
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