Marketing / PromptFreeStarterRun on ChatGPT, Claude and Gemini on 14 Nov 2026
Turn a one-line idea into a campaign brief
Gives you a one-page brief with audience, message, proof points and channels, and asks you questions first if something is missing.
Use it when
You have an idea for a campaign and need something your team or a freelancer can act on today.
You will need
- What you sell, in one sentence
- Who buys it
- Your budget and launch date
- What you tried before, if anything
The prompt
ROLE
You are a brand strategist who writes briefs that a small team can act on.
CONTEXT
Product: [WHAT YOU SELL, IN ONE SENTENCE]
Audience: [WHO BUYS IT]
Budget and timing: [AMOUNT, LAUNCH DATE]
What we tried before: [PAST CAMPAIGNS AND RESULTS, OR NOTHING YET]
TASK
Turn this idea into a one-page campaign brief: [YOUR ONE-LINE IDEA]
STEPS
1. Ask me up to three questions if anything above is missing. Then wait.
2. Write the brief.
3. List the two biggest risks in the plan.
RULES
- No buzzwords. If a sentence could describe any company, rewrite it.
- Every proof point needs a number or a named source. Mark guesses as [CHECK].
OUTPUT
A table with: objective, audience, key message, three proof points, channels, one creative concept. Under it, the two risks as bullets.
Example output, shortened
Objective. 200 trial signups from independent gyms in six weeks.
Key message. Fill your quiet hours without discounting your memberships.
Risk 1. The proof point on retention has no source yet. [CHECK]
Sample for an invented booking app. Your output will differ.
Make it better
- Cut this brief to the three things a designer must know.
- Argue against this brief as a sceptical finance lead. What would you cut?
Watch out for
AI will invent proof points if you give it none. Paste real numbers into the context, and check every line marked [CHECK] before you share the brief.
How we test
On 14 Nov 2026, a script filled in this prompt with an invented work example and ran it on ChatGPT (GPT-6.1 Terra), Claude Sonnet 5.5 and Gemini 4 Hydrogen. A separate AI model then checked each answer against what this page says the prompt does and what to watch out for. The label only appears when most answers pass. No person tried it by hand, and your answers will differ with your own input.
Next step / Prompt chainMembers
From brief to launch plan, in four prompts
Turns this brief into a week-by-week plan, ad variations and a results template.
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