A Payment Gateway is a technology that facilitates online transactions by securely transmitting payment information between a customer, the merchant, and the bank. It acts as a bridge, ensuring that sensitive data is encrypted and processed efficiently, allowing for a seamless shopping experience. These gateways support various payment methods, including credit cards, debit cards, and digital wallets. By integrating with e-commerce platforms, a Payment Gateway helps businesses manage transactions while maintaining security and compliance with industry standards, ultimately enhancing customer trust and satisfaction.