This means that if you have a winding brick walk or archway, the brick pattern will follow the curvature of the lofted object and have correct orientation.
(you; have; a winding brick walk or archway) (This; means; that if you have a winding brick walk or archway, the brick pattern will follow the curvature of the lofted object and have correct orientation)
you This
have means
a winding brick walk or archway
that if you have a winding brick walk or archway, the brick pattern will follow the curvature of the lofted object and have correct orientation