Thanks Mommies with Cents for this info:

“Target has just released a new way to get coupons! You can now sign up for Target’s Mobile Coupons HERE. You will receive exclusive Target store coupons that can be stacked with mfg coupons. The cashier will scan the barcode on your phone to use the coupon.

The website states that you will get your monthly offers via text message with a link to a barcode that can be scanned at checkout. The same barcode can be used for multiple one-time-only coupon deals throughout the month. Offers always arrive on a Sunday. Standard message and data rates apply.

It is unclear at this time if these coupons will be the same as the coupons in the generator or entirely different coupons. Either way, this is a new and exciting way to save at Target.