Pretty straightforward. Do you 100% agree with the official (clerical) version of the religion that you practice. E.g. Catholics-do you believe that Pope is God's earthly spokesman? CofE do you believe that gay marriage is wrong? Christian's in general-do you believe that Jesus literally rose from the dead? Muslims-do you believe that the Koran is the literal word of God? Orthodox Jews-do you believe in Kosher? And so on. Feel free to point out any bits you don't believe in, how little you think you can believe before you can't reasonably identify with the religion, anything that you think is so fundamental that you have to believe it in order to practice and whether you try to change the bits that you don't agree with.