How to Teach AI Your Brand Voice

Written By Valerie Di Paolo

Congratulations! You’re about to get a plug-and-play system that trains your AI to write content in your brand’s unique voice—across all emails, social posts, blogs, website copy, and ads. This guide walks you through what it is, how it works, and exactly how to use it.

What This Guide Includes

  • Gather Copy Examples – Copy suggestions and guidelines that will yield the best results

  • Brand Voice Training Prompt – Step-by-step AI system to define your brand’s tone, style, and personality.

  • Refinement Instructions – How to adjust the voice until it truly represents your brand.

  • Final Brand Voice Prompt – Use this in every AI content session to stay consistent.

How to Use This Guide

  • Read the Guide First – Familiarize yourself with all steps before starting.

  • Gather Your Brand Content – Collect examples of emails, blogs, social posts, or website copy that best represent your brand’s tone, style, and personality.

  • Follow the Steps in Order – Start with Step 1 to build your brand voice, refine it in Step 2 if needed, and finalize it in Step 3.

  • Use the Prompts as Written – Copy and paste the prompts into your AI tool.

  • Fill in the placeholders ([BRAND NAME], [AUDIENCE], [PAIN POINT / CONTEXT], etc.) with your specific information.

  • Test and Adjust – Test your AI-generated outputs. Make small refinements as needed.

  • Save Everything – Keep your finalized brand voice prompt and example emails somewhere safe. You’ll reuse them for future AI content creation.

Step 1 – Gather Your Copy Examples

Provide real writing from previously created and published works. Aim for 600–1,200 words total across formats.

Great sources (pick 4–8 pieces):

  • Website: homepage hero + subhead, About page opener, key service/product page, a landing page.

  • Emails: 1 marketing/promo email, 1 relationship/education email, 1 transactional/onboarding email.

  • Content: 1 blog post/excerpt (300–600 words), 1 case study intro or testimonial block.

  • Sales/Ads: 1 ad (search/social), 1 sales page section or deck slide with headline + bullets.

  • Social: 3–5 posts from your primary channel (captions + any hooks/CTAs).

Tips: choose recent, public-facing, and on-brand samples; avoid ghostwritten agency drafts if they don’t sound like you. Include 1–2 pieces you consider your “gold-standard” voice.

Step 2 – Build Your Brand Voice

Purpose: Train your AI to understand your brand tone, style, and personality, so it can create consistent content across all platforms.

Instructions: copy and paste the prompt in the grey box below into your preferred AI tool, replace anything in [ ] with what it asks for, and copy and paste your brand voice examples where indicated.

Prompt to Use:

 
You are an expert brand strategist and copywriter. Your task is to create a detailed brand voice for [BRAND NAME] that can be used consistently across all content types (emails, social media posts, blogs, website copy, ads, etc.). Analyse the provided examples for: • tone and energy of voice • phrasing and sentence rhythm • word choice and vocabulary • how the brand connects with its target audience ([insert audience]) • style • unique qualities that help it stand out from industry norms ([insert industry]) Using these examples, create a single copy-paste brand voice prompt I can use to generate AI content that matches this voice. Assign this brand voice a short, memorable name so it can be easily referenced in future prompts. Important: Do not create a brand voice if the provided samples are too limited, generic, or inconsistent. Instead, give me a clear explanation of why the material isn’t sufficient to build a distinct brand voice, and a specific list of what additional content you need (e.g., longer blog excerpts, client-facing emails, ad copy, or social posts). Only proceed to draft a brand voice once you have enough strong examples to ensure accuracy. If in doubt, ask clarifying questions instead of inventing a placeholder or default voice. Examples to analyze: [insert examples of emails, blogs, website copy, etc.]
 

Note: this prompt is designed to force the AI to ask you for additional copy if it doesn’t have enough to create a unique voice. Give it what it asks for if it requests more copy, before moving onto Step 3.

Step 3 – Refine the prompt (if Needed)

Purpose: Make sure the brand voice feels true to your brand.

Instructions: If the brand voice isn’t quite right, copy and paste the below prompt, replace the [ ] with what it asks for, and copy and paste your brand voice examples where indicated to refine it with more examples

 
The brand voice you provided doesn’t fully capture the personality of [BRAND NAME]. Think deeper. I’m providing additional samples below. Re-evaluate the voice end-to-end and provide a revised single copy-paste brand voice prompt I can use to generate AI content that matches this voice. [Insert 3–5 pieces of content: emails, blog excerpts, social posts, website copy, or ad copy]
 

Continue using this prompt with new copy examples to adjust tone, phrasing, and personality until it truly reflects your brand.

Step 4 – Finalize and Use Your Brand Voice

Purpose: Lock in your brand voice so AI always writes consistently.

Instructions:

  • Copy your final brand voice prompt and save it somewhere safe.

  • Use it at the beginning of every AI content session.

Final Prompt for All AI Content Creation:

 
Act as an expert brand strategist and copywriter. Match its tone, rhythm, and language rules. Only use formatting and phrasing that fit this voice. Ensure every response stays consistent with this voice. If a response feels generic or off-brand, refine it automatically to match the voice. From this point forward, filter all responses through this voice. This is the brand voice to use: [PASTE FULL BRAND VOICE DESCRIPTION GENERATED IN STEP 1 OR 2]
 

you’re now Ready to Put Your Brand Voice on Autopilot

By following these steps, you’ve created a system that ensures every piece of content—emails, blogs, social posts, ads, and more—sounds like you, every time. No more guessing, no more inconsistent tone, and no more scrambling to write on-brand copy.

Your AI is now trained to understand your brand’s personality, speak your language, and deliver content that resonates with your audience. The best part? You can reuse this prompt over and over, saving hours of writing time while keeping your messaging consistent and professional.

Valerie Di Paolo
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