What type of message reference can be informal?

An informal message reference is characterized by its casual tone, language, or style and is often used in personal communication. Examples of informal messages include emails, texts, or notes to friends and family where the structure is relaxed, and the sender's personality can shine through.

However, the question highlights the possibility of both informal and formal messages existing within a broader context of communication. While formal messages adhere to specific structures and etiquette often used in professional settings, the versatility mentions that informal messages can also serve as references, especially in comfortable environments.

This means that both types of messages can function as references depending on the context in which they are used. This reflects the understanding that effective communication can take many forms, and recognizing the appropriateness of both informal and formal references can enhance communication skills.