offerIdentifier
The string identifier of an offer that you create in App Store Connect.
Declaration
string offerIdentifierDiscussion
The offerIdentifier is a string that you provide in App Store Connect when you set up an offer. All offer types (offerType) have offer identifiers, except for introductory offers.
For more information on offer codes, see Supporting offer codes in your app. For more information on promotional offers, see Set up promotional offers for auto-renewable subscriptions.