ASL sign language is a language equivalent to English or any other, and is widely used in the deaf community. If you are a hearing person, you may find it equally helpful to know this language, both to learn a new and interesting language and in developing better communication with deaf members of the family, with deaf friends and with deaf people you might encounter in the community. Learning ASL will also help with a linguistic career, if you are inclined in that direction. There is a good demand in many professional disciplines for qualified and certified interpreters in ASL.