In most cases, you already have an existing Shopify store with existing products. Getting those products into Orderlytics is easy using the Import Shopify Products service. Once you select the import function, select the retailer (e.g., Amazon) you will see a list of products on the Product Listing page.
From there, you need to search/assign the Retailer Product ID/SKU, so that Orderlytics knows which product to purchase. Once the Retailer Product ID/SKU is assigned the product will become active.
Note: There is no need to upload the product back to your store since it already exists.