Torque means "the shaft's designed resistance to twisting during the downswing. The torque value is expressed in degrees, so the lower the degrees of torque, the more resistance the shaft will have to being twisted from the force of the downswing on the clubhead attached to that shaft. The higher the degrees of torque, the less resistance the shaft will have to being twisted by the mass of the clubhead on the downswing. "
If you're a beginner and you have a slow, smooth swing, I won't recommend a low torque shaft. I would look for a regular shaft with about 4 - 4.5 degrees of torque