This character is a Other Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. U+1F4DD offers a line break opportunity at its position, except in some numeric contexts.
The CLDR project calls this character โmemoโ for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: communication, media, notes, pencil.
This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Variation Selector-15: ๐๏ธ See the Emojipedia for more details on this characterโs emoji properties.
The Wikipedia has the following information about this codepoint:
A memorandum (pl.: memorandums or memoranda; from the Latin memorandum, "(that) which is to be remembered"), also known as a briefing note, is a written message that is typically used in a professional setting. Commonly abbreviated memo, these messages are usually brief and are designed to be easily and quickly understood. Memos can thus communicate important information efficiently in order to make dynamic and effective changes.
In law, a memorandum is a record of the terms of a transaction or contract, such as a policy memo, memorandum of understanding, memorandum of agreement, or memorandum of association. In business, a memo is typically used by firms for internal communication, while letters are typically for external communication.
Other memorandum formats include briefing notes, reports, letters, and binders. They may be considered grey literature. Memorandum formatting may vary by office or institution. For example, if the intended recipient is a cabinet minister or a senior executive, the format might be rigidly defined and limited to one or two pages. If the recipient is a colleague, the formatting requirements are usually more flexible.