Difference b/w Post and Post and Transfer button in journal form

Hi Everyone,

What is the difference b/w post and post and transfer button in journal and how we differ from functionally put a entry in general journal.

I have tried both scenario  from general journal:

1.create a general journal with one lines and click post button the record is posted .

2.create a general journal with one lines and click post and transfer button the record is also posted .

I could not understand the purpose of second one......plz let me give a solution.........

Thanks,

A.D.Karthik