i have many wallpapers site my key word in Google are much more batter than yahoo. how can i improve my yahoo key word search
Is there any relation between age and % of Yahoo visitors? IMO Yahoo traffic will increase with time. Anyway if you have good SERPs with Google, Yahoo and Bing will follow
For getting results with yahoo, have you submitted sitemap to yahoo and bing? Other than that you dont have to do anything special to get results from yahoo except to monitor the webmaster dashboards for notifications of any errors etc.
Submit sitemaps and optimize your robots.txt file - build a quantity of links over quality and gain rankings