There is a disconnect between when you usually get exposed to ads and when you actually need them. You might read about a deal at work in you an email. Maybe get it in the post at home. When you need it might be on the way home a week from now, and by then you won’t remember what it was, where you put it or how to use it.
Use the smartphone or smart eyewear. It will show you what ads, deals and coupons you have around you. Point it in a direction and see all of them superimposed on the view (augmented reality). You can also scan the ads with the app and it will alert you when you are around the place advertising.