SMS stands for Short Message Service, which is a text messaging service component of most telephone, internet, and mobile device systems. It is a way to send text-only messages of up to 160 characters between phones. SMS is a stateless communication protocol in which every SMS message is considered entirely independent of other messages. It uses standardized communication protocols that let mobile devices exchange short text messages. SMS is the most common form of text messaging used today. It is a text-only format, meaning it doesn’t encompass texts that also relay information through images or videos. SMS is the protocol cellular phones use to send and receive text messages over a 2G, 3G, 4G, or 5G network. Unlike app-based messaging services, you dont need a data plan to send and receive SMS. SMS is used for various purposes, including personal communication, marketing, and machine-to-machine communication.