The huntsman crafting discipline provides players with a means of crafting ranged weapons. Longbows, shortbows, harpoons and more can be made with this discipline, and these will be useful for most of the professions in the game (Elementalists cannot use any of the created items). As with any crafting discipline, you are going to need a good amount of materials either through farming or through purchasing on the Trading Post.
In traditional MMOs, items are the reason for playing the game, for griding through dungeon after dungeon to obtain the highest-level gear possible.
Given the fact that Guild Wars 2 challenges this by essentially removing that gear grind, the role that all items play in the game, armor and weapons, takes on a different meaning.