Any time inventory gets received from a supplier, Shopify will automatically update the quantity of products available in your online store. 

This is much more effective than tracking your inventory manually. But in order for this to work, you need to enable inventory tracking. Here’s how you do it.

Step #1: Click “Products” on your admin dashboard and navigate to “All Products.”

Step #2: Select a product from the list.

Step #3: Edit the variants of the selected product.

Step #4: Make sure “Track Quantity” is enabled.

Step #5: Save your changes.

Repeat this process for all products and variants that don’t currently have inventory tracking enabled.