The Elevation describes the up and down angle of the satellite antenna. The angle is adjustable on the backside of the dish bracket, as the angle itself can be read on the side of the bracket as shown in the picture. Please pay attention that the angle at the end of the white edge and not the angle at the middle of the screw is the relevant one.
The Azimuth describes the cardinal direction in which the satellite antenna has to look. Depending on the place of installation the alignment is between south east and south west.