A TRANSFORM map in ServiceNow is a field map set that controls the relationship between the import set table’s displayed fields and the target table’s existing fields, like Incident[incident]{"detectHand":FALSE} or USER[sys_ser]{"detectHand":false}.
After transform map creation, you can reuse this to map data from one more import set to the same table.
A transform map ALLOWS an administrator to define final destinations for data imported on tables. This will make it easier to specify linkage between the import set table’s source fields and the target table’s destination fields.
You can use transform mapping to dynamically map source fields and destination fields.