A credit card reader is a device that allows businesses to accept payments made with credit cards or debit cards. These readers can be standalone machines or connected to smartphones and tablets, enabling transactions at various locations, such as retail stores or restaurants. They work by reading the information stored on the card's magnetic stripe or chip, securely processing the payment through a payment processor. Most credit card readers also support contactless payments, allowing customers to pay by tapping their card or using mobile wallets like Apple Pay or Google Pay. This technology enhances convenience and speeds up the checkout process, making it easier for both customers and merchants.