Here's a breakdown:
Formal language is appropriate when:
* Writing academic papers, research reports, or professional documents: These require precision, objectivity, and a detached tone.
* Addressing authority figures or colleagues in a formal setting: Maintaining a respectful and professional demeanor is key.
* Writing official correspondence: Letters, emails, and memos should be clear, concise, and free of informal language.
Informal language is appropriate when:
* Writing personal letters or emails to friends and family: This allows for a more relaxed and conversational tone.
* Creating creative content like stories, poems, or blog posts: Informal language can add personality and engage the reader.
* Communicating in casual settings: It's natural to use informal language with close friends or in informal gatherings.
The key takeaway: There is no absolute rule about using formal or informal language. The best approach is to choose the style that best suits your audience, purpose, and context.