As search engines have become more prominent, some affiliate marketers have shifted from sending e-mail spam to creating automatically generated web pages that often contain product data feeds provided by merchants. The goal of such web pages is to manipulate the relevancy or prominence of resources indexed by a search engine, also known as "spamdexing". Each page can be targeted to a different niche market through the use of specific keywords, with the result being a skewed form of search engine optimization.