Social media content created entirely by AI has a tell: it's technically correct but emotionally empty. It uses the right words in the right order, but it doesn't make anyone feel anything or do anything.
The solution isn't avoiding AI — it's giving it the right brief. A good social media prompt forces specificity. Specificity produces content that sounds like a person, not a content calendar.
Instagram Caption Prompts
For a product or service post
"You are a social media copywriter for a [BRAND TYPE] Instagram account. Write a caption for a post about [WHAT THE POST SHOWS]. Tone: [TONE]. Hook in the first line — it must stop the scroll. Under 150 words. Use line breaks for readability. Emojis: [YES/NO/SPARINGLY]. CTA: [DESIRED ACTION]. Banned: exclamation spam, 'Link in bio' as the only CTA, corporate language."
For a personal/creator account
"Write an Instagram caption sharing [PERSONAL STORY OR LESSON]. My account is about [NICHE]. Voice: authentic, first-person, conversational. Hook is a bold statement or counterintuitive claim. Story in the middle. Takeaway at the end. CTA: ask a question to drive comments. Under 200 words."
For a carousel post
"Write a caption for an Instagram carousel about [TOPIC]. The carousel covers: [SLIDE 1 TOPIC], [SLIDE 2 TOPIC], [SLIDE 3 TOPIC]. Caption should tease the content and give people a reason to swipe. Under 100 words. End with 'Save this for later' CTA."
LinkedIn Post Prompts
For sharing a professional lesson
"Write a LinkedIn post from a [ROLE] in [INDUSTRY] sharing the lesson: [LESSON]. Format: hook (1 line) → short story that illustrates the lesson → the insight → practical takeaway. Short paragraphs. Under 250 words. End with a question to spark discussion. No buzzwords. Sound like a real person, not a thought leader."
For a company announcement
"Write a LinkedIn post announcing [COMPANY NEWS]. Company: [COMPANY]. News: [WHAT HAPPENED]. Why it matters: [SIGNIFICANCE]. Tone: proud but not arrogant, human not corporate. Under 200 words. Include a CTA to [DESIRED ACTION: comment/click/share]."
For building personal brand
"Write a LinkedIn post where [YOUR NAME], a [YOUR ROLE], shares their perspective on [TRENDING TOPIC IN YOUR INDUSTRY]. Angle: [YOUR COUNTERINTUITIVE TAKE]. Credibility anchor: [ONE SPECIFIC EXPERIENCE THAT BACKS THIS UP]. Under 300 words. Don't use 'excited to share', 'humbled', 'thoughts?'"
Twitter/X Thread Prompts
For a how-to thread
"Write a 10-tweet thread about how to [ACHIEVE RESULT]. Target: [AUDIENCE]. Unique angle: [YOUR SPECIFIC TAKE]. Tweet 1: bold hook that promises value. Tweets 2–9: one actionable insight per tweet, numbered (2/ 3/ etc.). Tweet 10: summary + follow CTA. Each tweet must work standalone. No filler ('Let's dive in!', 'Here's a thread'). Under 240 characters per tweet."
For a contrarian take
"Write a 7-tweet thread challenging the conventional wisdom that [COMMON BELIEF]. My actual experience: [YOUR EXPERIENCE]. Evidence: [WHAT BACKS THIS UP]. Format: tweet 1 = the controversial claim. Tweets 2–6 = the argument with specific examples. Tweet 7 = nuanced conclusion that acknowledges when the conventional wisdom IS right."
The One Rule That Applies to All Platforms
The first line is everything. On Instagram it's the first line before "more." On LinkedIn it's the preview text. On Twitter it's the first tweet. If the first line doesn't make someone stop, nothing else matters. Write three versions of your first line before committing to one.
Browse Promptzio's Social Media prompt library for 25 fully structured prompts covering Instagram, LinkedIn, Twitter, TikTok, and YouTube.