Internet coupon

Electronic

• Internet coupons: Online retailers often refer to these as "coupon codes", "promotional codes", "promotion codes", "discount codes", "keycodes", "promo codes", "surplus codes", "portable codes", "shopping codes", "voucher codes", "reward codes", "discount vouchers", "referral codes" or "source codes". These are typed in before the sale is finalized. Marketers can use different codes for different channels or groups in order to differentiate response rates. Free shipping and cashback are additional inducements.
• Mobile: Smartphone based, these are often distributed via WAP Push over SMS or MMS, and presented at the store or online. These also have advertising benefits even after their expiration date.
• Apps: Related to classic coupons are loyalty cards; these have increasingly been superseded by mobile apps.