What kind of message would best be communicated in a formal tone?

Using a formal tone is most appropriate for a notification of a new policy change because it conveys the seriousness and importance of the information being shared. Formal communication is typically characterized by clear, concise language and a respectful demeanor, both of which are essential when addressing changes that may affect employees' roles, responsibilities, or workplace policies. This ensures that the message is taken seriously and highlights the organization's commitment to professionalism and clarity in communication.

In contrast, invitations to casual gatherings, messages of congratulations, and friendly reminders generally require a more relaxed and approachable tone to foster camaraderie and rapport. These types of messages are inherently less serious and benefit from a tone that encourages warmth and positive interaction among colleagues.