These kind of messages are used to send necessary information to the customers or users. for example a school send sms to their students, similarly a bank send alert messages to their users , in the same way a company send messages to their client regarding invoice amount of using their product and services. Transactional SMS Messaging is always a better way to connect either to individuals or to the targeted audience in bulk. ransactional SMS service is mainly used for direct interaction between business & consumer. TRAI introduced this category to limit the unsolicited communication