The first reason businesses use bulk SMS is speed. Messages are delivered instantly, no matter where the customer is. If a company wants to send an offer or share an urgent update, SMS reaches people in seconds.
The second reason is reach. Unlike social media or apps, SMS doesn’t need the internet. Any mobile phone can receive it, which makes it perfect for reaching a wide audience—even in remote areas.
Another big factor is trust and security. OTPs and verification codes sent through SMS keep accounts safe. Customers know the business is protecting their information, which builds loyalty. 
And of course, there’s cost-effectiveness. Compared to traditional ads, bulk SMS is much cheaper but delivers stronger results. Small shops and large enterprises alike can run campaigns without spending a fortune.
In short, businesses use bulk SMS because it is fast, reliable, secure, and affordable. From promotions to security alerts, SMS helps them stay close to their customers in the most direct way possible.