Before using the AWO dynamic coupon tag in your Remarkety campaign, you will need to create an AWO coupon template in your AWO coupon module in your Joomla admin. This coupon will serve as a template for Remarkety to then create unique coupon codes for each email you send.
The coupon you create within your AWO will receive a numerical ID (for example 54). You will see this ID after you save the coupon in the column furthest to the right.
In order to be sure this coupon, you will need to user the ID in the coupon settings of the campaign.
One of the most important things you will need to be sure to change the coupon Published field to Template.
See this screenshot for example: