Solution

UPI stands for Unified Payment Interface. It is a real-time payment system developed by the National Payments Corporation of India (NPCI) that facilitates instant money transfers between bank accounts through mobile devices with the help of a mobile app. It allows users to send and receive money, pay bills, and make online transactions without the need for bank account details. UPI has become popular in India due to its ease of use, convenience, and secure nature, making it a widely adopted payment method for various transactions.