How to do it
Decide the number first: three to five posts a week
Buffer's analysis of its own users found consistency matters more than volume, with regular posters seeing roughly five times the engagement. The jump from posting once a week to three to five is where the return is biggest, and each step above that returns less. For a service business, three good posts beat seven rushed ones.
Collect raw material, not topics
Open a note on your phone and dump what actually happened this week. The rooftop unit you found packed with cottonwood. The customer who asked why their bill doubled in July. Three photos from a panel swap. That is your input. If you ask ChatGPT for post ideas with no input, you get generic filler, because that is all you gave it.
Write a prompt with a role, the facts, and a hard format
OpenAI's own guidance is to give the model a clear role, provide the reference material, and specify the output shape. So: 'You write Facebook posts for a 12-person HVAC company in Columbus. Here are three things that happened this week: [paste]. Write three posts, 60 to 90 words each, plain language, no hashtags, each ending with one question.' Vague prompts are the reason people think the output is bland.
Give it two of your old posts as examples
This is few-shot prompting, and it is the fastest way to kill the AI tone. Paste two posts you actually wrote and liked, then say 'match this voice.' The model copies rhythm and vocabulary from examples far better than it follows an adjective like 'friendly.'
Edit every post before it goes out
Cut the first sentence, which is usually throat-clearing. Delete any sentence you would not say out loud. Check every fact: prices, model numbers, service areas, whether you actually do that work. ChatGPT does not know your business and will fill gaps with plausible guesses.
Schedule the batch, do not post one at a time
Write the week in one 20 minute sitting and schedule it. Posting live means posting when you remember, which means not posting. The whole benefit of drafting with ChatGPT is that a week of content becomes one task instead of five interruptions.
Where this goes wrong
The parts most guides skip, and the ones that actually cost you money:
- Letting it write customer testimonials. This is the one that can actually cost you money. The FTC rule effective 21 October 2024 bans fake reviews and testimonials, and explicitly reaches AI-generated ones and reviews from anyone with no real experience. Civil penalties run up to $51,744 per violation. Never ask ChatGPT to write a review or a customer quote.
- Buying followers or likes to make the page look busy. Selling and buying fake indicators of social media influence is prohibited under the same rule. It also does nothing for you, since none of those accounts will ever call.
- Asking for ten posts at once. Quality drops off fast after the first three or four in a single response. Ask for three, take the best two, ask again with better input.
- Posting the hashtag soup. Left alone, ChatGPT tends to append a block of hashtags. On a local service page that reads like a bot. Tell it no hashtags in the prompt.
- Treating the output as final. It has no idea what you charge, where you work, or what you legally can claim. Every unedited post is a chance to publish something that is not true about your own company.
- Posting daily because someone said to. Buffer's data shows the gains shrink with each step up in frequency. A sustainable three a week outperforms a daily run that dies after a month.
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Common questions
How many posts a week should a small service business publish?
Three to five is the practical range. Buffer's analysis found the biggest lift comes from moving from once a week to three to five, with diminishing returns above that, and that consistency drives roughly five times the engagement.
Can ChatGPT write a review or testimonial for my page?
No. The FTC rule effective 21 October 2024 bans fake and AI-generated reviews and testimonials, with penalties up to $51,744 per violation. Ask real customers instead and let them write it.
Why do my ChatGPT posts sound like everyone else's?
Because the prompt had no real input. Paste actual events from your week, give it two of your own posts as voice examples, and set a word count and format. OpenAI's guidance is role, reference material, and defined output. Skip those and you get the average of the internet.
Can ChatGPT post to Facebook for me?
Not on its own. It drafts. Scheduling still happens in your posting tool. Plan on writing a batch and loading it in one sitting.
Should I say the post was written with AI?
For a normal marketing post, no rule requires it. The line you cannot cross is presenting AI-written content as a real customer's words or experience.
Sources
- How often to post on social media: a data-backed guide — BufferAnalysis of over 100,000 Buffer users found consistent posting generates about 5x more engagement; gains diminish with each step up in frequency, and the largest return comes from moving from about once a week to 3 to 5 posts.
- Prompt engineering guide — OpenAIOpenAI's stated tactics include explicit role and workflow guidance, few-shot learning with a handful of input/output examples, supplying relevant reference material, and defining output format and structure.
- FTC finalizes rule on consumer reviews and testimonials — GoodwinEffective 21 October 2024, the rule bans fake reviews and testimonials including AI-generated ones and those from people with no actual experience, and bans selling fake indicators of social media influence, with civil penalties up to $51,744 per violation.
Related guides
- How to use ChatGPT for review requests
- How to use ChatGPT for follow-up emails
- Auto review request after every job (HVAC)
- How to use ChatGPT for quotes and estimates
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