An SMS gateway allows a computer to send or receive Short Message Service (SMS) transmissions to or from a telecommunications network. Most messages are eventually routed into the mobile phone networks. Many SMS gateways support media conversion from email and other formats. Bulk SMS is an active SMS channel used to send SMS to a large group of customers and is considered to be cheaper than messages sent from your phone. Sending messages in bulk gives it its name. It is better than conventional methods of marketing and email marketing. SMS has higher open rates than emails. They are opened within a few seconds upon receiving and customers are more likely to be aware of things that interests them. SMS has an advantage like none other, it can reach anyone anywhere anytime. This included, it becomes the most desirable option for marketing. Bulk SMS is used to promote and improve sales. Continuing relations with customers is imperative and including them in everything new is favorable. Bulk SMS also serves as reminders to customers regarding important appointments. Some of the other include transaction messages and confirmation messages.