A credit card reader is a device that allows businesses to accept payments made with credit cards or debit cards. It works by reading the information stored on the card's magnetic stripe or chip, enabling secure transactions. These devices can be standalone or integrated into point-of-sale systems. Credit card readers come in various forms, including handheld devices and those built into smartphones or tablets. They connect to payment processing networks to authorize transactions, ensuring that funds are transferred from the cardholder's bank to the merchant's account. This technology has made shopping more convenient for consumers and streamlined payment processes for businesses.