This document discusses email etiquette and best practices. It defines email as text-based messages sent over computers that allow for quick one-to-many communication at almost no cost. Proper email etiquette is important for professionalism as emails can have harmful consequences if mistakes are made. The document outlines the key components of an email, including addressing recipients, writing a clear subject, keeping the message body concise yet informative, only attaching relevant files, and having a brief signature. It provides dos and don'ts such as checking emails before sending, avoiding abbreviations and excessive punctuation, and waiting before sending emotional replies.