The problem
Copy production is the engine room of a marketing agency. Every client, every campaign, every channel needs words — and those words need to be on-brand, on-strategy, and on brief. For a busy agency with ten to twenty active clients, the volume of copy requests is relentless. Social posts, ad variations, email subject lines, landing page copy, SMS messages, push notifications: it never stops.
The traditional copywriter model does not scale well with this volume. A skilled copywriter can produce excellent work, but the sheer number of first drafts required — many of which will need significant revision or will be replaced altogether when a campaign direction changes — means copywriters are often burning time on work that never makes it to a client. The economics only work if you either overcharge for copy or underpay your writers, both of which create their own problems.
The real opportunity is not to replace copywriters with AI. It is to use AI to eliminate the blank-page problem. A copywriter who starts with ten AI-generated first drafts and refines the best three is dramatically more productive than one who writes everything from scratch. The creative judgement, brand sensitivity, and strategic thinking that make copy great are still human skills. The generation of raw material is a task AI does faster and at lower cost than any human. Agencies that implement this workflow report that copywriters feel less burdened rather than threatened — the tedious early-draft work disappears and the interesting refinement and strategy work increases.
The system
Step 1: Build the master brief document
Every copy production run starts with a structured brief. Before prompting anything, ensure you have documented: the client's brand voice (3 to 5 adjectives and what they mean in practice), the target audience, the campaign objective, the key message or offer, any mandatory inclusions (product names, URLs, disclaimers), and the channels required.
If you do not have a brand voice document, use Claude to help create one from existing approved copy:
"Here are three examples of approved copy for [client name]: [paste examples]. Based on these, write a brand voice guide that describes this brand's tone in 5 adjectives with a sentence of explanation for each. Also include: words and phrases to use, words and phrases to avoid, and two example rewrites showing the difference between on-brand and off-brand copy."
Store this brand voice document in your client folder. It becomes the foundation for every prompt you write for that client.
Step 2: Generate ad copy variations (Claude)
For paid advertising, you typically need multiple variations to test. Feed Claude the brief and request a bank of variations in a single prompt:
"You are an expert copywriter working for a marketing agency. Your client is [describe client]. Target audience: [describe]. Campaign objective: [describe]. Key message: [describe]. Brand voice: [paste brand voice guide or key adjectives]. Write the following ad copy: 5 Facebook/Instagram ad headlines (under 40 characters), 5 longer Facebook/Instagram primary text options (under 125 characters), 3 Google Search ad headline sets (3 headlines per set, under 30 characters each), 2 longer Google ad descriptions (under 90 characters). Each variation should approach the key message from a different angle: one benefit-led, one curiosity-driven, one social proof-led, one urgency-led, one problem-solution. UK English."
This produces 15 to 20 distinct copy units in one pass — more than enough to A/B test meaningfully.
Step 3: Generate social post copy (Claude)
For organic social, run a separate prompt for each platform because tone and format differ:
"Write ten LinkedIn posts for [client name] based on the following campaign brief: [brief]. Posts should vary in format: 2 long-form thought leadership posts (200 to 250 words), 3 short punchy posts with a hook, insight, and call to action (under 100 words), 3 posts that open with a counterintuitive statement or question, 2 posts sharing a client result or case study. Brand voice: [adjectives]. UK English. Do not use hashtags within the post body."
Run a similar prompt for Instagram with different format requirements. The key is that each platform gets its own creative pass rather than repurposed versions of the same content.
Step 4: Generate email campaign copy (Claude)
For email, structure the brief carefully before prompting:
"Write a 5-email campaign for [client name]. Campaign goal: [describe]. Audience: [describe]. Offer or key message: [describe]. Brand voice: [describe]. Emails should be sent on: Day 1, Day 3, Day 7, Day 14, Day 21. Each email should include: a subject line, a preview text, and the email body (150 to 300 words depending on the email's purpose). Email 1 should introduce the campaign. Emails 2 to 4 should educate, build desire, or overcome objections. Email 5 should close with a clear call to action. UK English."
Step 5: Review, edit, and brief the client (Notion AI)
Collect all the AI-generated copy into a Notion document organised by channel and format. Have your copywriter or strategist review and edit — focusing on brand alignment, accuracy, and tone rather than rewriting from scratch. This is the human layer that makes the AI output genuinely good.
Use Notion AI to write a brief copy rationale for the client presentation:
"Write a short paragraph explaining our approach to this campaign's copy to present to a client. Mention that we have developed multiple variations for testing, that the copy addresses [key audience insight], and that the tone reflects [brand voice description]. Keep it to 100 words."
The results
Before this workflow, a copywriter producing a full campaign suite — ads, social, email — for a single client might spend a full day or more in first-draft mode. With this system, first-draft production for a complete campaign takes 60 to 90 minutes, with another 60 to 90 minutes for human review and editing.
Agencies using this approach report that copy throughput per copywriter increases by 200 to 300%. A copywriter who previously managed five active clients can comfortably manage twelve to fifteen. Copy revision rounds with clients also decrease because the volume of options means the best creative has a better chance of being in the initial deck.