If you like to track inventory, you should go to the Back office - Item list. Click on the item to open it for editing then in item card you will see the inventory, activate Track stock and introduce the number of items you have in stock and the number of items to which you want to be notified about the low stock. If you have many items then you can do it by importing CVS file in the Back office. There are columns where you can fill the number of items in stock and the quantity of low stock. This is the basic way to track inventory.
However, there is Advanced inventory feature also which allows you: to create, send, and receive purchase order to and from suppliers, to modify and manage the stock of items in each store, to view inventory valuation report, to view records of all the changes made in the inventory.