How to use Categories

Jun 10, 2011 at 7:06 PM
Edited Jun 10, 2011 at 7:27 PM

I have have been reading on Categories but not really sure how they should be used - any clarifications would be appreciated.

Also if I understand correctly, a different symbol can be added to each category. My question is is this is so can one add a different image icon to each category? If yes can someone provide and example?