IPIN in HDFC refers to the Internet Personal Identification Number. It is a unique password provided by HDFC Bank to its customers for secure online banking. This password, combined with the customer ID, allows users to access their HDFC Bank account online, enabling them to perform various banking transactions and activities conveniently from their home or office. With an IPIN, customers can check account balances, transfer funds, pay bills, view transaction history, and manage their finances without visiting a bank branch. It ensures that online banking transactions are secure and that only authorized users can access the account.