라인 is a term that can refer to various concepts, but it is often associated with the popular messaging app, LINE. This app allows users to send messages, make voice and video calls, and share multimedia content. It is widely used in several countries, especially in Japan, where it originated. In addition to messaging, LINE offers various features such as LINE Pay for mobile payments and LINE Games for entertainment. The app also includes a social networking aspect, allowing users to follow official accounts and receive updates from brands and celebrities.