unpacking for newbies

yes, it's true, i have no experience with unpacking. i have followed a few tutorials, but he/she made it look so easy. i'm not totally sure what the unpacking achieves apart from finding the OEP of the exe.

I did manage to find where the license file was read and the dongle number was displayed in plain sight, however i did not get much further than that, i need more knowledge to continue (and some more time wouldn't hurt either ).

I have used a wibu logger in the past, but did not understand what it was giving me, i will investigate further.

cheers for the responses.