Note: The Referral System for Coupon Reach campaigns only supports Directory Offers, not Standalone (i.e., single standalone coupon).
To be able to add offers to a campaign's referral system, first go to the Referral Portal section in the campaign properties.
Then open up the Referral Reward tab.
You can then add your desired Referral Offers by clicking the Add Offer button beneath the Enable Offer prompt.
The reward offers can then be claimed through the Reward Offer link that is typically inserted in the Referral Reward messages (SMS & Email). This is the message that the user receives when they complete the Referral System's required number of referrals.