This is a kind of SMS service in which there is a delivery guarantee of 95% (5% exceptional cases of not available etc). This is basically used for OTP service, Some Informational message, Event details etc. There sms are delivered quickly. Transactional Sms are not used for any political information.
This type of Sms service is for Promotional use. All deals, sales, events political etc fall under this category. These are comparitively slow then transactional sms and are mostly forbidden on DND services.