The AI campaign brief: ten minutes instead of three hours, and better for it

Vague briefs are the most expensive thing in marketing. The cost shows up downstream: generic creative, mediocre results, a campaign running six weeks before anyone admits it’s underperforming, and a “marketing isn’t driving pipeline” conversation you’ve had before.

A good brief from a senior person used to take a few hours. The AI campaign brief takes ten minutes. Output quality comes down almost entirely to the quality of inputs.

What to give it: the audience segment with specific attributes (title, company type, buying stage, the trigger that makes them ready for this message), the product or feature you’re promoting, the business goal, and customer language from your win/loss synthesis or recent call transcripts. Skip the buyer language and the output defaults to internal product marketing copy.

What comes back: a structured brief with an objective, target audience definition, core message, three supporting messages, channel mix with rationale, content angle per channel (not just “blog post” but the specific angle and what the reader should walk away thinking), and a primary success metric tied to the business goal.

The brief is a starting point. You edit and refine it. The thinking scaffolding is done before the kickoff meeting rather than rewritten in it.

Add this to the end of the prompt: ask it to list the three assumptions in the brief most likely to be wrong. It surfaces the weakest parts of the strategy before you commit budget to them.

Store your ICP definition and brand positioning in a Claude Project so the agent references them on every run. Brief quality improves when it doesn’t have to infer your audience from scratch each time.

The prompt:

You are a senior B2B demand generation strategist writing a campaign brief for a marketing team.

I will provide: (1) the audience segment we're targeting with specific attributes, (2) the product or feature we're promoting, (3) the business goal for this campaign, and (4) any relevant customer language, competitive context, or recent market signals.

Write a complete campaign brief structured as follows:

Objective: [one sentence, specific and measurable]
Target audience: [title, company type, buying stage, and the specific situation or trigger that makes them ready for this message]
Core message: [the single most important thing this audience needs to hear, in their language]
Supporting messages: [three messages that reinforce the core, each addressing a different concern or angle]
Channel mix: [recommended channels with a one-sentence rationale for each, based on where this audience actually is]
Content angle per channel: [the specific approach for each channel — not just "blog post" but the angle, format, and what the reader should walk away thinking]
Primary success metric: [one metric, tied directly to the business goal]
What this campaign is not: [one sentence on the wrong interpretation or misuse of this brief]

Keep the language direct and specific. Replace any marketing jargon with plain language a CFO could read and understand.

Campaign inputs: [paste your audience, product, goal, and context here]