On Marketplace Multi Vendor Module for Magento2, there is a setting on the admin end called “Enable Low Notification”. When this setting is enabled then the seller get notified through their e-mails when their inventory decreases with subsequent orders. As soon as the inventory reaches to the specified minimum level set by the admin, a low stock notification mail will be sent to the seller.  In “Low Stock Quantity” setting, the admin will enter low stock quantity, which will allow sending low stock notification mail to sellers when product quantity will be equal or less than this quantity.