Question

for what target audience is it use some informal language?

Answer 1

I think you mean: “For which target audiences is it appropriate to use some informal language?” Short answer: use informal language for audiences you expect to be casual, familiar, or looking for an approachable tone. Longer guidance:

When informal language is appropriate
- Friends, peers, classmates — personal messages, chats, social posts.
- Younger audiences (teens, young adults) in many consumer-facing contexts.
- Customers of a casual/consumer brand (retail, lifestyle, apps) where friendliness builds connection.
- Social media followers, blog readers, newsletter subscribers when the brand voice is conversational.
- Internal teams in many workplaces (day-to-day Slack, quick status updates) — depending on culture.
- Community forums, user groups, and support chats when a warm, helpful tone matters.
- Creative writing, fiction, or opinion pieces that aim for voice and personality.

When to avoid informal language
- Formal/official contexts (legal documents, academic papers, government communications).
- Job applications, professional proposals, résumés unless the company culture is explicitly casual.
- High-stakes communications (serious customer complaints, policy changes, compliance issues) where clarity and formality reduce risk.
- Cross-cultural situations where informality might be misread as disrespectful.

How to choose the right level
- Consider audience age, relationship, and expectations.
- Consider purpose: to inform/formally report vs. to persuade/engage.
- Consider channel: SMS/social vs. official email/letter.
- Match or slightly mirror the audience’s tone (tone matching builds rapport).

Quick examples (formal → informal)
- “Please let me know if you require any additional information.” → “Let me know if you need anything else.”
- “We appreciate your feedback and will investigate.” → “Thanks for the tip — we’ll check it out.”
- “Our office hours are Monday–Friday, 9:00–17:00.” → “We’re open Mon–Fri, 9–5.”

A few cautions
- Avoid slang or regional idioms that might confuse or offend.
- Don’t use informality to excuse sloppiness (check grammar, clarity).
- Emojis and contractions can be fine but use sparingly and only when appropriate.

If you tell me the specific audience or context (e.g., marketing email, customer support, university lecture, app notifications), I can give tailored phrasing and examples.