People who use Google as their favourite search engine will always rate Google as number one. When Google stops delivering good results, their alliance may move Yahoo!.

I know of website owners who concentrate only on Google rankings and don't bring Yahoo into the equation ... they don't view Yahoo! in the equation. Others are Yahoo! fans and rarely use Google. It is subjective and a matter of horses for courses. My granny still uses Yellow Pages!!

If, like me you study raw log files, you'll see the tangible evidence, you will see records of which search engine is delivering traffic. I obtain a lot from MSN as well as Google and Yahoo!. SEO can be very bias and if you optimise a page strictly for Google, you may miss out on traffic from Yahoo! and vice verca. When optimising remain open-minded.

It is worth looking at the fundamental differences between Google and Yahoo to get a better understanding as to why they are so different.

When it comes to citation links, Google has better ability to determine whether they are natural or true editoral citation against artificial.

Yahoo! still works far better than Google at indexing results from banner links, and Yahoo has a massive amount of internal content as well as paid inclusion material; these provide an incentive for Yahoo to bias search results towards commercial interest.

Google monitors natural link growth over a period of time. It is better to grow slow and sure with deep roots rather than buying into rubbish link farms that Google detest.

Google has a heavy biad towords information resources, good SEO is to ensure relevent links from Google friendly information sources. An up and coming one is www.information-source.org what ir as it grows.

Google operates duplicate content filters that will aggressively filter pages with very similar content. This helps kik out sweeper pages and those that copy content.

With Google crawl depth is determined not only by link quantity, but also link quality. This means that too many low quality links may render your site less likely to be deep crawled and result it not being indexed effectively.
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