What is the difference between Unstocked and Discontinued status?

Both of these are ways of changing your items status to help clean up what skus you see on your Order Plan.

Discontinued is a way of 'hiding' old or obsolete or not required items so you don't see them by default.

Unstocked is an item that is still sold but made to order or not needed to be tracked i.e. a bundled sku that you only make up when you sell/ship the item.