Buy 3 Get 1 Free Coupon

I'm seeking a skillful marketing professional to create a compelling Buy 3 Get 1 Free coupon for my customers. This campaign is aimed at both our existing and new customers. For successful redemption, this coupon must work both online and in-store. Therefore, I need a design that is compatible with our online system and perfectly printable for in-store use. Your previous experience with similar marketing campaigns and knowledge about our target audience will be invaluable for this job. Company logo and product picture will be provided, upon acceptance of the project