You can use this file to create your products and Purchase Orders, however you won't be able to mark the products to be published to Shopify as the data required for products is unique for Shopify stores, and cannot be automatically created through this tool.
In order to create your products and orders for Shopify you should:
- Use the Purchase Orders Matrix Spreadsheet following the instructions above
- Upload the file into Retail Express (creating your products and orders)
- Use the Mass Download feature to download a list of your Products in Retail Express
- Follow the instructions in the Shopify - Product Synchronisation article section "Publishing/Adding Products" for multiple products
Note: This will allow you to select products to be published online in bulk