Just like with most religions of a certain size and scope, Judaism has many different denominations. All denominations within their religion are about how best to interpret the faith, and each denomination does so as they see fit. The denominations in Judaism tend to form a sliding scale of conservativeness, or of traditionalism. Sliding from Orthodox, considered to be the more traditional and conservative, to Reform, generally viewed as the most progressive or liberal of the denominations. Obviously there are many denominations that fall in between those two and a few that are outside the sliding scale all together.