Looks to your liking
As a player, you will be able to change your facial hair as you see fit. Depending on your Race, you will have different options available, for instance, Tauren get to change their Horn styles and Horn colors, as well as their Facial hair, but nothing else-Undead get to pick new face styles, Draenei get to customize their horns, and so forth. Each modification you make has a new name, so every hairstyle has its own name, as does every single facial change or modification you make, some are really creative. Once you have changed your character looks to your liking, you will see an additional amount of buy rohan gold quoted below the options; this is the amount you will pay in order to get your desired changes. The more options you change, the more it will cost.