This document discusses electronic payment systems. It defines electronic payment as payments made using electronic methods like credit cards and e-wallets. A payment gateway allows e-commerce sites to process these electronic payments securely and provides benefits like quick settlement, various payment options, and a good customer experience. While electronic payments offer convenience and increased sales, they also carry risks like fraud and increased business costs. Common types of electronic payments discussed are credit cards, debit cards, smart cards, e-wallets, and gift cards.