In the Episcopal Church we use traditional Christian creeds to articulate our faith. "Creeds" are nothing more than "articles of faith," or "statements of belief," used by followers to help them focus on what the most important aspects of their faith and teachings are.
The Apostles Creed was one of the first statements of faith to be formulated by early Christians. Traditionally its authorship is attributed to the Twelve Apostles, in which each of the disciples contributed one article. However, the exact origins and dating of the creed is an area of scholarly debate.
The Nicene Creed is in many ways based on the Apostle's creed, and was formulated in the Third Century A.D. These revisions were intended to resolve theological concerns that to most of us seem foreign. However, it was this debate that unified the early Christian Church and spread it's influence throughout Europe.
The important thing to remember is that the Creeds attempt to do much more than simply define or declare "truth," rather they attempt to resolve theological conflict by inviting us all to recognize our own human frailty in regards to the unknowable mysteries of God. Whatever your feelings may be on the creeds, they can play an important part in your worship, and through them we are unified in our worship, prayer, and practice.