circled M

Ⓜ is a symbol consisting of the capital letter 'M' enclosed in a circle, commonly used to represent metro or subway systems, especially as a station marker. It originated in Japan, initially for the Tokyo Metro, and has since been adopted by many urban transit systems worldwide. In digital communication, it often indicates metro station locations, public transport information, or topics related to city transportation. Emotionally, it conveys practicality, guidance, and urban life, sometimes used in contexts of travel or commuting.