Inventory zero warning

On 16 June 2024, @lubos has discussed this very feature.

“If you are using minimal stock levels feature where you can set desired quantity for each inventory item, then…”

Just found out where the Minimal Stock Levels feature is.

It is labelled Reorder Point, and it is within each inventory item which we create.
Just need to click on it and enter the Qty desired.

But even after entering the Qty desired, nothing happens when that Qty is reached or goes below. Anyone know how the Reorder Point notifies us?