To set up viaGlamour for dropshipping on Shopify, you need to first ensure that you have the viaGlamour app installed on your Shopify store. Once the app is installed, products will be automatically imported and synced with your store. viaGlamour tracks products for fulfillment by allowing you to change the product's 'location'. This is private and only visible to you. It is the method viaGlamour uses to track which items are supposed to be fulfilled by their app. For the "available inventory" settings, you can set it to either "all locations" or "viaGlamour". Both options will work for managing your inventory with viaGlamour.