An inventory item represents the physical good available to be shipped to a customer. It holds essential information about the physical good, including its SKU and whether its inventory is tracked.
There is a 1:1 relationship between a product variant and an inventory item. Each product variant includes the ID of its related inventory item. You can use the inventory item ID to query the InventoryLevel resource to retrieve inventory information.
What you can do with InventoryItem
The Shopify API lets you do the following with