As you know that through Shopify admin you can not manage product metafields easily in bulk. By using this app you can manage your product metafields (single-line text field) one by one or in bulk by just clicking on buttons. You can use this app to view list of existing fields on app screen itself or you can also export existing fields values on spreadsheets. You can also use this app to create print-slips with custom field values also printed on print-slips.