A bulk SMS service is one of the simplest and most effective tools for reaching customers instantly. But it also depending on the purpose of businesses can choose from different types of services. Here are the most common ones:
1. Promotional SMS
These are used mainly for marketing campaigns. Businesses send offers, discounts, and new product updates to attract and engage customers. For example, a retail store can promote a festival sale by sending thousands of SMS in one click.
2. Transactional SMS
This type is used for important customer communication like OTPs, payment alerts, order confirmations, or appointment reminders. Transactional SMS ensures customers get secure and real-time updates whenever they need them. 
3. OTP & Verification SMS
While technically part of transactional SMS, OTPs are so common that they are often treated separately. Every time you log in to an app, reset a password, or complete an online payment, the verification code you receive is delivered via an OTP SMS.
4. Alerts & Notifications
These include messages like delivery status, service updates, school or hospital reminders, and emergency information. They are used to keep people updated without any delay.
Why It Matters
Each type of bulk SMS service has its own role in business communication. Promotional messages help with sales and customer engagement, while transactional and OTP SMS build security and trust. Alerts and notifications keep customers informed and satisfied.
By understanding these types, organisations can plan better communication strategies and use SMS in the most effective way.