The Minimum Order Quantity (MOQ) specifies the lowest quantity of a certain product that a supplier is willing to sell.
When MOQ is specified it doesn't change replenishment suggestions that are shown on the Replenishment report. However, when variants are added to a purchase order and the quantity is below the MOQ, it is automatically rounded up to the MOQ.
In the Vendor screen, select a vendor by clicking its name. This will open the Vendor settings where you will see the following options:
For purchase orders: This applies MOQ to the total purchase order for the selected vendor. If the total quantity is less than the value entered here, a warning will appear in red on the purchase order.
For variants or products: This applies MOQ to the variant (SKU) or product (group) level. This value can be inputted at Vendor > Variants or uploaded from a spreadsheet at Replenishment > Import > Single Vendor Catalog.