List the offers you are happy for Amy to run — "25% off", "free shipping", "buy 2 get 2". When she writes a campaign she uses whichever of your own live Shopify discounts matches one of them, preferring the code your orders redeem most.
She never runs an offer that is not on this list, and never writes copy promising one. An empty list, saved, is the answer "we do not discount".
An offer marked “no coupon code needed” is a deal your store prices by itself, like a bundle. Amy puts that one on every campaign as it is, with a “No code needed” line instead of a code, and looks for no Shopify code to match it.
Your signup popup’s first-order offer and your post-order store credit are shown here too, but they are set on their own pages — one offer, one home.