You need to have the Groupon Deal or Groupon Promo Code in hand when you reach the advertiser to purchase the product or receive service. There are two methods available to display the Groupon deal to the advertiser so that the advertiser can provide you with the required service within the discount offer. The first - print the purchased Groupon Deal and bring it with you to the advertiser (which is a feasible way when the advertiser is in your area). The second - show the Groupon to the advertiser using the Groupon application.