There is no denying to the fact that Google is a monopolist in web market. However, it is not the only search engine, and the recent researches show that 20 to 25 percent searches are done on Yahoo. So, as an SEO professional, you cannot afford to optimize your website just for Google, but need to consider the specifics of other two engines also, i.e. Yahoo and MSN.
Optimizing Your Website for Yahoo However, optimizing for two search engines is not an easy job. There was a time when SEO people used to believe that algorithm of Yahoo was just the opposite of Google’s, because the pages that received good rankings in Google failed to rank well in Yahoo, and vice versa. No doubt algorithms of both search engines are different, but as they are constantly changing, it is difficult to say what exactly is different. Even with keeping in mind the changes, it is not possible to respond to every change, even when the details of algorithms were known publically. However, learning about some basic differences can help you get improved ranking.
Yahoo spiders the web-pages on the internet, indexes them in database and performs several operations to produce page with search results, just like other search engines. Yahoo! Slurp is considered as the 2nd most active spider crawler on the internet and is not much different from other bots. It may be more active than Googlebot, as at times there are more pages in Yahoo index compared to Google. Another difference between these 2 search engines is sandbox. The Google’s sandbox is comparatively deeper, therefore if you have recently made changes to your website, you may have to wait for sometime till these changes appear in search results.
Of all the difference between these two search engines, the way keywords are placed in the URL and in the Title is considered as the most important. If the keyword is used in these 2 places, you can expect to get position in top 10 Yahoo search results. The major difference lies in keyword density. The higher the keyword density, higher the positioning in Yahoo, but beware as some of keyword rich websites on Yahoo may fall into keyword stuffing category on Google. So, if you try to rank well in Yahoo with keyword-density above 7 to 8 percent, you risk to be penalized by Google.