You want to show the product SKU along with the product on the invoice.
SKU is the unique identifier that is used to identify the product or any of its variants. It is used to track inventory and mapping products when integrating with other marketplaces. By default, only product name, tax and amount appears on the invoice. To add the SKU along with the product, you need to make changes to the invoice template. Invoice Templates section of StoreHippo Admin Panel allows you to customize the invoice templates.
Follow the below steps to add SKU field in the invoice: