Yes, you can add promo codes to your banner ads, and some platforms make it easy to do this. One way is to include the code in the image design itself, so it shows up every time the ad runs. Another way is to use dynamic ad tools that let you change the promo code based on the audience or time. This can be helpful during sales or special campaigns. If you’re using a feed or custom script, the platform might update the banner with the right code without you having to change the design. Has anyone here tested banners with rotating or seasonal promo codes before?