How do I make a discount code or coupon?

Honestly: the Marketing screen does not create discount codes, coupons, automatic sales, or scheduled campaigns. It only writes marketing text — text for Google, social posts, a promo line, and a newsletter intro — that you copy and use yourself. If you want to advertise a sale, write it into your store text and posts manually. So don’t look for a coupon tool here — it doesn’t exist; the Marketing kit helps with the words, not the discount mechanics.