What are the beliefs of the religion?

Well, there are lots of different religions, and it turns out that different religions believe different things. One thing most religions have in common is that they believe in some sort of supreme being or beings - i.e., God, or several gods, depending on the religion. For more detail, do some reading about religion (for example, read the Wikipedia article on "Religion" for a general overview), and about individual religions - for example, you might read the Wikipedia articles (or other sources) on specific religions such as Christianity, Islam, Bahá'í Faith, Buddhism, Zoroastrianism, the Wiccan religion, the ancient Greek religion (note: this one is still active!), etc.