As search engine Google is the most popular but for SEO I think Yahoo is more helpful and Bing is still in position Nr.3 after Google and Yahoo
The vast majority of the visitors who come to my sites via search engines have used Google. Only a very tiny percentage - less than 10% -have used Yahoo.
I think Yahoo! is more popular than Bing but Google is just the #1 out there and they can not be beat.
google is popular search engine better then the yahoo but yahoo is better website then search engine...
Lot of people know only Yahoo, and use only Yahoo as search engine. It was a surprise when I had asked a home user about Google, she said she never heard of Google! and she knows and uses only Yahoo for search. On the other hand, Google is widely used in educational institutes and popular among student community, though Bing is picking up recently.
My opinion is In general search engines are pretty similar and unless you regularly clean out cookies and use dynamic IP they can tailor the content to you. However, you can still see differences even when the aforementioned is true.
Google is largest as for as queries and popularity is concerned but Yahoo and Bing is sometime, argued as more authentic and reliable in some delicate matters.