I found that when ever we got the search visitors from yahoo search engine it provides us the back link from yahoo.
Huh? You get search visitors from a Search Engine and it provides a backlink? I'd think the backlink was already in place... that's how they found you in the first place.
United States of America Bing holds around 10% market share and it is continuously rising month by month with its pleasing looks and increasing search awareness, whereas Yahoo has a stable market share of around 15% which is not experiencing any changes, in case of Google the market share is around 70% the maximum amongst all search engines and has went through a minor loss of market share of around 1-2%, these figures include the web searches and not the other activities.
Yahoo search engine is becoming more and more popular. It's not the best but it's good! But they focus on Google which quality is excellent
http://searchengineland.com/yahoo-search-direct-alphabet-every-letter-starts-with-yahoo-69956 check this out, new features in yahoo engine )
yahoo is a good search engine, but now they are following Bing search results, you can check yourself, both search engines have same results for any query...