What are the pros and cons of coarse and fine coffee ground?
Mainly the grind types have to do with how long the grounds are going to be in contact with the water during the brewing of the coffee. Finer grinds for espresso (quick brewing) and medium grinds for drip, etc. This chart will give you an idea of what grinds go with which preparations http://www.ineedcoffee.com/03/coffeegrind/