SMS banking allows customers to receive notifications and check account balances via text message. There are two types of SMS messages: push messages sent by the bank with alerts and notifications, and pull messages initiated by customers to check balances or transactions. Axis Bank's SMS banking service provides automatic alerts for transactions and also allows customers to send SMS requests with keywords to check balances, recent transactions, cheque statuses, and demat account balances. SMS banking offers benefits like safety through transaction alerts, convenience without visiting branches or ATMs, time savings, automatic updates on payments, and accessibility from anywhere globally.