Formal greetings are polite ways to acknowledge someone, often used in professional or official settings. They typically include phrases like "Good morning," "Good afternoon," or "Good evening," followed by the person's name or title. Using formal greetings shows respect and sets a positive tone for the interaction. In many cultures, formal greetings may also involve specific gestures, such as a handshake or a slight bow. These customs can vary widely, so it's important to be aware of the appropriate cultural norms when greeting someone. Overall, formal greetings help establish a courteous atmosphere in communication.