+A **Payment Gateway** is a digital conduit, securely channeling financial [transaction](/wiki/transaction) details between a customer and a [merchant](/wiki/merchant). It encrypts sensitive data, ensuring safe transfer from a website or mobile app to a payment processor, vital for [online payment](/wiki/online_payment) and [e-commerce](/wiki/e-commerce).
+## See also
+- [Credit Card](/wiki/credit_card)
+- [Payment Processing](/wiki/payment_processing)
+- [API](/wiki/api)
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