One of my site's 3 keywords ranking dropped in Yahoo but for the same keywords ranking remain same in Google. What should I do to improve the ranking? One dynamic page listed in this ranking, how should I promote this page. In this page url there is question mark and equal to sign and main page without this mark, so which page I should target to promote that keyword?
Do you generally get a lot of traffic from yahoo? If you don't, then I wouldn't worry too much about it. Google generally sends like a 1000x more traffic than Yahoo so I stopped looking at positions of my sites a while ago. But if it's different for you, then I'm not sure. I found that Google is harder with the keyword rankings so Yahoo should easily give you a better (if not the same) ranking.
Although it would be great to rank well in Yahoo as well but I wouldn't really really worry or lose some sleep over the fact that my site has had a slight ranking drop in Yahoo that attracts a lesser number of users than Google. Focus more on the content though.