When exporting or providing tracking info to other system they might require speicifc courier service names or codes for it to map up correctly on their end.
External Courier Services names can be used for this to provide a translation between the CourierService Name in Mintsoft and what the other channel knows it as.
Shipping Management -> Extras -> External Courier Service Names
In Mintsoft the service is known as
DPD - Next Day Parcel
But when it gets notified to another system they just know it as dpd
So you'd setup an external Courier Service Name to do that
If there are lots to be added it can also be done via csv. Shipping Management -> Extras -> Uploads - ExternalCourierServiceName as the template