These two functions often operate one after the other as stock reaches the end of it's availability or lifespan. You can switch both of these features off at any time.

Run to Zero is end of a stock line and you are not expecting to receive more of this item - once it's gone, it's gone!

Discontinued items are classed as inactive and will not available for sale or purchase. These items will not appear in your stock items list until the Discontinued filter is applied.