in Magento, there is a 'free shipping' method but in NetSuite 'free shipping' is not available. What is the alternative of free shipping in Netsuite? When we import the 'free shipping' method order from Magento to NetSuite through suit script, which value is set for SHIPPING CARRIER and SHIPPING METHOD in NetSuite.

Create a zero value shipping method and map it to that? Might be better asking in general or admin channels tbh...