Differences in Search Engine Relevancy Criteria on the Major Engines

[regic]

Good article on the different relevancy criteria each of the major search engines use to determine SERPs:

Many people think a search engine is broken or their site is banned if they do not rank in one engine while they rank great in others. This article will hopefully help searchers understand the different relevancy criteria used by different engines. While people have looked at search engine ranking factors on a global level I do not think anyone has spent much time comparing and contrasting how different search engines compute their relevancy scores or bias their algorithms.

I think one of the hardest parts of explaining SEO is that the web is such a diverse place where things that make sense in one industry would make no sense in another industry. In addition, different engines look for different things to determine search relevancy. Things that help you rank in one engine could preclude you from ranking in another...

full article: http://www.seobook.com/relevancy/