Bulk SMS for OTP transactions is a crucial use case that enhances security and user authentication in various online transactions. Organizations use Bulk SMS services to deliver One-Time Passwords (OTPs) instantly to users’ mobile devices during transactions, such as online banking, e-commerce purchases, and account logins. This method adds an extra layer of security by ensuring that only the legitimate user with access to the registered mobile number can complete the transaction. The efficiency and speed of Bulk SMS make it a reliable solution for delivering OTPs promptly, contributing to a secure and seamless user experience in digital transactions.