The stock alert feature sends you notifications if your product's stock amount is getting too low.
How to set the stock alert quantity
If you have the Inventory management feature, you can set the stock alert by following these steps:
Go to the Inventory section from the left menu.
Find the product in which you want to set the alert.
Open the Change menu above the list and select Alert quantity.
Set the quantity into the field.
Click Save,
If you don't have the Inventory management feature, you can set the stock alert when you set a stock value to the product.
Stock alert notification
By default, the system sends you a notification whenever a product's stock amount is less than the stock alert value. You can define how the notifications are sent to you in the notification settings.