In Google Analytics for a particular page there is a Bounce Rate and a % Exit value. Now I need to know what is the exact difference between them. On which value among these two, should I concentrate more?
bouncers are people who landed on that page and left from that page without looking elsewhere on your site. Exiters are people for whom that was the last page they looked at on their visit, but they had been to other pages first.
The value you should be concentrating on is goal conversion, whether that is completing an enquiry form, signing up for a newsletter or making a purchase, whatever it is you want people to be doing on your site you need to know that they are doing it. Sometimes bounce visitors will convert, sometimes people exit because they have converted.