You kill them in order to carve bits from them - hides, claws, tusks etc.|
Those materials can then be used to craft better weapons and armour which then allow you to face tougher monsters.
I played through it on Wii and really got into it once I got the idea of understanding the strengths and weaknesses of differing monsters, and knowing what items were needed to craft various weapons and armour - there's a great wiki that has all the charts and tables.
Online play was also great fun - teaming up with more advanced EGers to take down a Deviljho, or to go hunting a Jhen Moran in a special event.
Edited by Alastair at 13:13:01 13-03-2013
Not as nice as I used to be