Synopsis;
The Inscription profession allows its practitioners, called "scribes," to enhance the spells and abilities of players’ characters, such as enhancing a rogue's Backstab ability to deal more damage to stunned targets, or allowing a priest’s Circle of Healing to heal one more target.
Scribes can also aid enchanters by permitting them to sell their enchantments directly on the Auction House, or help other characters by creating enhancing scrolls like Scroll of Strength.
All in all, inscription is a very useful profession for the benefits a scribe brings to his friends and himself. This profession can be chosen by any character of any race or class.