A short written message, also known as a NOTE, is a brief written communication typically sent to someone in order to convey information or express gratitude. Notes are usually written on paper or sent electronically via email or text message. Notes can be used for a variety of purposes, such as to thank someone, to apologize, to express sympathy, or to provide an update on a project. Notes are often kept brief and concise in order to convey the necessary information quickly and effectively.