+A **Promo Code** is an alphanumeric sequence, often entered during an [online purchase](/wiki/online_purchase) or at checkout. It unlocks a specific [discount](/wiki/discount) or special offer, encouraging transactions. These codes are a common tool in digital marketing strategies.
+## See also
+- [Coupon](/wiki/coupon)
+- [Marketing](/wiki/marketing)
+- [E-commerce](/wiki/e_commerce)
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