Internet banking allows customers to conduct financial transactions online through secure websites or mobile apps. It was first introduced in the United States in 1994 and later adopted in India, with ICICI Bank being the first to offer internet banking services there in 1997. Customers can use internet banking to pay bills, shop online, book tickets, and access other banking services conveniently from anywhere at any time. While it offers benefits of convenience and lower costs, security risks require banks and customers to take precautions like using encrypted connections and not disclosing login credentials.