When an item is out of stock, you must communicate to buyers an availability estimate. You can provide that information by selecting a time frame from a drop-down menu.
Follow these steps to create an availability estimate:
Go to Site Menu → Commerce → Settings and click on the Availability Estimates tab. Click the button at the top right.
Enter the estimate in the Title field. For example, 2-3 weeks, or 4-6 days.
Enter a priority to establish the order estimates appear in the drop-down. Lowest numbers come first.
Click Save. Repeat steps 1-3 if you must create different estimates for different products.
To apply an availability estimate to a product, go to the product’s Configuration tab and make a selection from the Availability Estimate drop-down. See Configuration for more information. The estimate is displayed automatically whenever the product is out of stock.