The term "creed" is often used in religious contexts. For example, there are the Nicene Creed and the Apostles' Creed that are used in Catholic churches as well as in some other Christian churches. These creeds are statements of belief in which the congregants are affirming that they believe in the things that their church doctrine says that they should.
This makes sense because the word "creed" comes from the Latin. It comes from the word "credo" meaning "I believe." The Latin versions of the two creeds mentioned above both start with this word. This is a conjugation of the verb "credere" meaning "to believe."