Cha-ching! “Save big by purchasing today!” “Get free-shipping on orders over $__” “Order now and get your first $__ free!” All of these are catchy calls-to-action which are exceptional triggers for people to buy from promotional ads and using discount codes from their favorite influencers who encourage them to complete their purchase. A discount code is usually a several digit pattern of numbers and letters that allows a customer to receive a discount when making a purchase.