fyi

FYI is an acronym for "for your information." It is used to introduce information that the sender believes may be useful or relevant to the recipient but does not necessarily require a reply or action. The phrase functions as a heads-up or a note to share data, updates, or context.

The term is common in English-language business communication and has spread to email, instant messaging, and social media. It is typically employed to preface summaries, references, or background material without asserting urgency or instruction. In practice, it helps recipients decide whether to read the attached item or to retain it for later, without implying an obligation to respond.

Origins of the acronym are not tied to a single inventor or event; it emerged as part of informal shorthand in mid- to late-20th-century professional writing and gained prominence with the rise of email and workplace chat. Its use reflects a relatively casual tone that contrasts with more formal or directive phrases.

Usage considerations include tone and audience. FYI can speed communication and reduce excessive explanations, but overuse or inappropriate use can seem curt or presumptive. In formal settings or when sharing sensitive information, a more explicit framing or the inclusion of a request may be appropriate. In some cases, writers add qualifiers such as "Just FYI" or tailor the message to indicate whether a response is welcome.

Variants and related practices include writing "FYI" in uppercase or with a colon, or simply labeling a message as information-sharing. Overall, FYI remains a common, neutral shorthand for transmitting information in both professional and informal contexts.