Electronic payment is a payment that is transmitted electronically through various means like telephone lines, mobile phones, and the internet. It is a subset of e-commerce transactions for buying and selling goods or services online. Common forms of e-payment include debit cards, credit cards, prepaid cards, smart cards, mobile payments using phones, biometric payments, television set-top boxes, and micro-payments for small online purchases. The document then provides more details on specific types of e-payment methods like how debit cards work by accessing funds from a linked bank account while credit cards allow borrowing.