Hi Muthu ,
Bifurcation means alternate word of our target keyword. for an example for the keyword jobs we can make several alternative keyword like careers,opportunity,naukri etc.
before the choosing most appropriate keywords we need to check.
1)relevancy of the page.
2)searching pattern
3)keyword density
4)KEI
these are the few stuffs we need to check.
Regards,navin
Sep 2, 2013