Religion is a formal way for a person to practice their beliefs or faith as they match up to the religion they belong to. Religion is essentially a structured form of spirituality with each religion typically having its own unique set of beliefs, holy books, and rules that it's followers are supposed to subscribe to. Popular religions include: Judaism, Christianity, Islam, Hinduism, Buddhism, Bahá'í, and Sikhism.
Below is a list of popular websites about the concept of religion in general or about a specific religion.