Transactional SMS are basically non-marketing automated text messages that are used to send OTP and other important informational messages regarding any products and services to support the customers. They are delivered to all the recipients irrespective of their opt-out status, this is the reason why all the banks use transactional Bulk SMS service. This exclusive feature of transactional Bulk SMS gives it an edge over other modes of SMS as the important details can be delivered at any time. They have a rapid reach, They can be sent from one source to the other at a very fast pace. There is no time lag i.e. they are delivered to the customers without any sort of delay. This is especially useful when urgent immediate information needs to be sent to the customers.They are often used for sending home delivery messages, hotel booking alerts etc.