Transactional SMS : Transactional SMS are informative SMS. People like to receive these SMS like banking, school & colleges alerts, bill payment reminders, Otp Etc. Transactional SMS will be delivered to all dnd and non dnd numbers and it works 24 hours.
Promotional SMS : brands send promotional SMS to registered & non-registered mobile numbers to boost their reach and sales. SMS will be delivered 9 am to 9 pm only. Promotional SMS will deliver only to non dnd numbers.