A Payment Gateway is a technology that facilitates online transactions by securely processing credit card and other payment information. It acts as a bridge between a customer and a merchant, ensuring that sensitive data is encrypted and transmitted safely. This allows businesses to accept payments through their websites or mobile apps without compromising customer security. When a customer makes a purchase, the Payment Gateway verifies the transaction details with the customer's bank and the merchant's account. Once approved, the funds are transferred, and the customer receives confirmation of their purchase. This process is essential for e-commerce, enabling smooth and secure financial exchanges.