Short Message Service (SMS) is a text messaging service that enables the transmission of short messages, typically up to 160 characters, between mobile devices. Introduced in the 1990s, SMS revolutionized communication by allowing users to send concise text-based messages over cellular networks. SMS became widely popular as a quick and convenient method of staying in touch, especially before the widespread adoption of internet-based messaging apps. Although newer messaging services now offer enhanced features like multimedia and voice messaging, SMS remains a reliable and widely supported means of communication across mobile devices worldwide.