Every time an order is created in Shopee, this order goes to Shopify through OMNA. Shopify updates its inventory and notifies OMNA of the update through a webhook. OMNA finds the product associated with the change in the inventory and update the product in Shopee. When the product inventory is updated directly in Shopify, OMNA will be notified to update Shopee's inventory accordingly. The inventory level will be updated from Shopify to Shopee in a few minutes.