how increase ranking in yahoo search engine

o improve your website's ranking (for all search engines) you now need to add social widgets to your home page.  When your visitors click on the widget of their choice (Facebook, Twitter etc.,)  the bots' that are sent out to rank websites pick up on this and (over time) your search engine rank will improve. 

Accepting the fact that even the technology itself competes with one another , I can still vouch for the quickest yahoo service.  It has never been overlapped, not to mention other competitive web sites.