One of the most important steps in improving your site’s ranking in Google search results is to ensure that it contains plenty of rich information that includes relevant keywords, used appropriately, that indicate the subject matter of your content.
However, some webmasters attempt to improve their page’s ranking and attract visitors by creating pages with many words but little or no authentic content. Google will take action against domains that try to rank more highly by just showing scraped or other auto-generated pages that don’t add any value to users. Examples include:
- Thin affiliate sites: These sites collect pay-per-click (PPC) revenue by sending visitors to the sites of affiliate programs, while providing little or no value-added content or service to the user. These sites usually have no original content and may be cookie-cutter sites or templates with no unique content.
- Doorway pages: Pages created just for search engines
- Auto-generated content: Content generated programatically. Often this will consist of random paragraphs of text that make no sense to the reader but that may contain search keywords.
- Scraped content: Some webmasters make use of content taken from other, more reputable sites on the assumption that increasing the volume of web pages with random, irrelevant content is a good long-term strategy. Purely scraped content, even from high-quality sources, may not provide any added value to your users without additional useful services or content provided by your site. It’s worthwhile to take the time to create original content that sets your site apart. This will keep your visitors coming back and will provide useful search results.
There is no problem in being an affiliate as long as you create some added value for your users and produce valuable content that gives a user a reason to visit your site. For example, you could create product reviews, ratings, and product comparisons.
If your site has been removed from our search results, review our Webmaster Guidelines for more information. Once you’ve made your changes and are confident that your site no longer violates our guidelines, submit your site for reconsideration.
source: http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=66361