A payment gateway is a technology that facilitates the secure processing of online payments. It acts as a bridge between a merchant’s website or application and the financial institutions involved in a transaction, allowing customers to make electronic payments for products or services.

To understand a payment gateway, imagine you are making a purchase on an online store. When you proceed to the checkout and enter your payment information, the payment gateway securely transmits that data to the appropriate financial institution (such as a bank or credit card processor) for authorization. Once the payment is approved or declined, the gateway relays the response back to the merchant and customer.

Payment gateways enable various types of online transactions, including credit card payments, debit card payments, digital wallet payments, and bank transfers. They encrypt sensitive information, such as credit card details, to ensure secure transmission and protect against fraudulent activities.

A payment gateway typically involves multiple parties, including the merchant, the customer, the payment gateway provider, and the financial institutions. The gateway provider facilitates the communication and coordination between these entities, ensuring that payments are processed accurately and securely.

Payment gateways also offer additional features, such as recurring billing for subscription-based services, fraud detection mechanisms, and integration with other business tools or systems.

Merchants integrate payment gateways into their websites or applications using APIs (Application Programming Interfaces) or plugins provided by the gateway providers. This allows them to seamlessly accept online payments and manage transactions.

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