Why only 3 Search Engines matter
You may have seen spam email or ads on the web promising to submit your site to hundreds, if not thousands of search engines. That may be very well, but 3 search engines have 96% of the market (as of December 2004): Google, Yahoo and MSN.
AOL, which comprised 9% of all searches, is absent from the pie chart because its results are fed by Google. So if you want to optimize your site for search engines, it makes sense to focus on these exclusively. Making efforts to rank highly on search engines such as Ask, Excite or LookSmart is not worth it.

