A previously valid alphanumeric string offered by retailers reduces the price of books. These codes, once applied during online checkout, subtracted a percentage or fixed amount from the purchase total. For example, a user might have entered a specific string during a promotional period to receive 20% off their order.
The advantage of using such codes lies in their capacity to incentivize purchases, fostering increased sales volume for booksellers. Their historical context is tied to marketing strategies designed to attract customers during specific periods, such as holidays or seasonal promotions, building brand loyalty, and clearing out older stock.
