Why Is the Outfeed Table on a Jointer Adjustable?

Why is the outfeed table on a jointer adjustable?

John Brock: So it can be set to the height of the cutters and eliminate snipe.

Richard Jones: To make fine adjustments so as to get the surface of that table tangent to the cutting circle described by the cutters in the cutter block.

Carol Reed: As you sharpen cutters you will find that you may need to adjust the outfeed table to align with them.