Guide
ChatGPT prompts for marketing, and where to save them
The marketing prompts worth keeping are the ones for work you repeat: a content brief from a topic, a week of social posts from one article, ad variants that each test one angle, and a readout of campaign results against target. Copy the four below, add three of your best pieces as examples, then save them where your AI reads them on its own: the short version of your voice in custom instructions, each campaign's files in a project, and each repeated task as a skill. That's what stops the copy sounding like everyone else's.
Short answer
- Four prompts: brief, social posts, ad variants, campaign readout.
- Make them yours: three of your best pieces, your banned words, your claims list.
- Save them: voice in custom instructions, campaigns in projects, tasks as skills.
- Check every claim before anything is published.
The four prompts
1. Content brief
"Write a brief for an article on [topic] for [audience]. Include the question the reader searched, the answer in two sentences, five sections, one example only we could give, and the call to action. Our past brief that worked: [paste]."
2. Social posts from an article
"Turn this article into five posts for [channels], each on a different angle: a number, a myth, a customer question, a how-to, a checklist. Each channel's length: [list]. Our voice: [three posts that performed]. Article: [paste]."
3. Ad variants
"Write six ad variants for [product] for [audience], each testing one angle only: price, speed, proof, fear of missing out, simplicity, a customer's words. Claims we may make: [list]. Claims we may not make: [list]."
4. Campaign readout
"Here are last month's campaign results and the targets. Say what beat target, what missed, the most likely reason for each, and the one change to test next month. Don't invent causes the data doesn't show. Results: [paste]."
Where to save each
| What | Where | Why |
|---|---|---|
| Your audience, tone, banned words | Custom instructions | Applied in every chat |
| One campaign's brief, assets and results | A project per campaign | Instructions and files apply inside the project |
| A task you repeat for every campaign | A skill | Loaded when you ask for the task |
From OpenAI's and Anthropic's help pages, read 5 November 2026.
A worked example
Illustration: a made-up business. Tom does marketing alone for a small coffee roaster. Every Monday he pastes the social-posts prompt, then hunts for three old posts to paste after it as examples. He moves it:
- Custom instructions: "Small coffee roaster in Bristol. Warm, plain, a bit dry. Never 'artisan', never 'elevate'."
- A project for the winter campaign with the brief and the product photos list.
- The social-posts prompt as a skill, with his three best posts inside it.
Now "a week of posts from the brewing-guide article" is the whole request. His ad prompt keeps one rule he'd learned the hard way: "Claims we may not make: 'best coffee in Bristol'", because he can't back it up.
Save your first prompt
- Pick the prompt you paste most.
- Add your three best pieces as examples, and your banned words.
- Move your voice basics to custom instructions.
- Save the task as a skill and test it on this week's work.
- Delete the old copy from your notes.
Next step: one voice for the whole team
Once more than one person writes copy, your voice needs to live where everyone's AI reads it. One brand voice for a marketing team's AI writing covers building the guide and sharing it, and Claude skills for marketing the skills after it; getting your team to use AI the same way covers the rollout.
Skills for this
- AI practiceTurn a prompt into a skillTurns a prompt that works into a skill the whole team can reuse, with a valid name, a when-to-use description, steps, an output template, an example, and checks.
- MarketingBrand voice guide and rewriteExtracts a voice guide from 3 to 5 sample texts (traits with do and don't pairs, a word list, mechanics) and rewrites a draft in it.
- MarketingSocial posts from an articleTurns one article into a LinkedIn post, an X thread, and a short post, each hooked on the article's most specific point.
- MarketingAd copy variants with a test matrixWrites Google Search, Meta and LinkedIn ad variants within character limits, one angle per variant, with a test matrix for each.
Questions
What are good ChatGPT prompts for marketing?
Prompts for tasks you repeat: a content brief from a topic, a week of social posts from one article, ad copy variants that each test one angle, and a readout of campaign results against target. Add three of your best pieces as examples, or the output will sound like everyone else's.
How do I make ChatGPT write in my brand voice every time?
Put the short version (who you write for, tone, banned words) in custom instructions, and turn the full voice guide with examples into a skill, which the AI applies whenever you ask for copy.
Can AI-written ads make any claim the AI suggests?
No. Advertising claims need to be true and backed up, whoever wrote them. Put the claims you may and may not make into the prompt, and check every claim before it runs.
AI skill
Have your AI turn a prompt that works into a skill your team can reuse
Put this skill in AI Skill Pod and everyone on your team gets it in their Claude, Cursor or ChatGPT (Pro, Business, Enterprise): one invite link, free to start. When one of these prompts gives you copy you'd publish, Turn a prompt into a skill has your AI turn it into a skill with your examples and banned words, so the next brief starts from your standard, not a blank chat.
14 days free · No card needed
Sources
- Claude Docs: Prompting best practices — examples and clear instructions improve results (read 2026-11-05)
- OpenAI Help: ChatGPT custom instructions — applied across chats; read through search-result text (read 2026-11-05)
- OpenAI Help: Projects in ChatGPT — project instructions and files; read through search-result text (read 2026-11-05)
- Claude Help Center: Using skills in Claude — every plan with code execution on (read 2026-11-05)
- FTC: Endorsement Guides, what people are asking — don't make claims about a product that would require proof the advertiser doesn't have (read 2026-11-05)