Brand Voice & Consistency
You've spent the last four days learning to generate descriptions, optimize for SEO, and write bullet points that convert. There's one problem left to solve: making it all sound like you.
Without voice training, AI writes in a competent but generic tone. It sounds like "a good writer" — not like your brand. And when a customer reads three of your listings and each one sounds different, trust erodes. Consistency is what separates a brand from a random collection of products.
Today you'll build a "brand bible" prompt that teaches AI exactly how your brand sounds. Once it's built, every piece of content AI generates will carry your voice.
What brand voice actually means
Brand voice isn't just about being formal or casual. It's a combination of elements that make your copy instantly recognizable:
Tone — Are you warm and friendly? Professional and authoritative? Playful and irreverent? Luxurious and aspirational?
Vocabulary — Do you say "purchase" or "grab"? "Residence" or "home"? "Utilize" or "use"? The words you choose signal who you are.
Sentence structure — Short, punchy sentences feel energetic and confident. Longer, flowing sentences feel luxurious and thoughtful. Fragment sentences? Bold. Casual. Modern.
Perspective — Do you address the customer as "you"? Do you say "we" as a brand? Do you write in third person?
Personality — Are you the expert who teaches? The friend who recommends? The luxury brand that curates? The rebel who challenges?
Most sellers have a brand voice — they just haven't defined it explicitly. You know how your brand should sound when you read your best product listing. Today you'll put that intuition into words so AI can replicate it.
The brand bible prompt
This is the most valuable prompt you'll build in this course. It's a set of instructions you'll paste at the beginning of any content generation session. Here's the structure:
"You are the copywriter for [Brand Name]. Here is how our brand writes:
Tone: [Describe your tone — e.g., "Warm and knowledgeable, like a trusted friend who happens to be an expert"]
We say things like: [3-5 phrases that sound like your brand]
We never say: [3-5 phrases or styles that don't fit your brand]
Sentence style: [Short and punchy / Flowing and descriptive / Mix of both]
Perspective: [First person "we" / Second person "you" / Third person]
Our customer is: [Brief description of who you're writing for]
Brands we sound similar to: [1-3 brands with a similar voice, if helpful]
Here are 5 examples of our best product copy:
[Paste 5 real examples from your store]
Use this voice for everything you write. Match the tone, vocabulary, and style of the examples."
Building your brand bible — step by step
Step 1 — Find your best 5 listings. Look through your store and pick the five product descriptions, emails, or social posts that sound most like "you." These don't have to be perfect. They just need to feel authentically like your brand.
Step 2 — Identify what makes them sound like you. Read them out loud. Notice the tone. Notice the word choices. Notice the rhythm. Are they short and direct? Warm and conversational? Technical and precise? Write down the patterns you notice.
Step 3 — Fill in the template. Use the brand bible structure from above. Be specific. "Professional" is too vague. "Confident and knowledgeable but never stuffy — we explain things clearly without talking down to our customers" is actionable.
Step 4 — Test it. Paste your brand bible into ChatGPT, then ask it to write a product description. Compare the output to your original examples. Does it sound like your brand? If not, adjust the instructions.
Step 5 — Save it. Store your brand bible somewhere you can easily copy and paste it. A note in your phone, a document in your drive, a pinned message in your project. You'll use it every time you generate content.
Maintaining consistency across 500+ listings
A brand bible solves the voice problem for individual descriptions. But how do you maintain consistency when you have hundreds of products? Here's the system:
Start every session with your brand bible. Every time you open a new chat to generate content, paste your brand bible first. This is non-negotiable. It takes five seconds and ensures everything in that session matches your voice.
Create category-specific additions. If your product line spans multiple categories, add category-specific notes. Your outdoor gear might sound slightly more rugged than your office accessories. The core voice stays the same, but the flavor shifts. Add a line to your brand bible: "For outdoor products, lean slightly more adventurous. For office products, lean slightly more refined."
Run consistency checks. Periodically paste 5-10 of your AI-generated descriptions into a new chat and ask: "Do these all sound like they're from the same brand? Identify any that feel off-brand and explain why." AI is excellent at spotting inconsistencies you might miss after reading hundreds of listings.
Update your brand bible quarterly. Your brand evolves. New products, new customers, new positioning. Review and update your brand bible every few months to make sure it still reflects how you want to sound.
When your brand voice doesn't exist yet
If you're a new seller and you haven't established a brand voice, AI can help you find one.
Try this prompt: "I'm launching a [product category] brand targeting [audience]. I want my brand to feel [2-3 adjectives]. Generate 3 sample product descriptions for [product], each in a distinctly different brand voice. Label each voice with a personality type so I can compare."
AI will give you three options — maybe one that's warm and conversational, one that's sleek and minimal, and one that's bold and energetic. Pick the one that feels right, then use it as the foundation for your brand bible.
There's no wrong answer here. The only wrong choice is having no voice at all — because that's how you end up sounding like every other generic seller on the platform.