How to Write Product Descriptions With AI: A Step-by-Step Workflow

On this page 13

1. The short answer: a 6-step workflow
2. What AI does well with product descriptions, and where it goes wrong
3. Step 1: Build a product fact sheet
4. Step 2: Decide the buyer, the channel and the voice
5. Step 3: Use a reusable prompt
6. Step 4: Generate variants, then combine
7. Step 5: Edit for accuracy and specificity
8. Step 6: Make it findable without keyword stuffing
9. Worked example: from fact sheet to finished description
10. Pre-publish quality checklist
11. Writing descriptions for a whole catalog
12. Common mistakes to avoid
13. Which AI tool should you use?

The short answer

To write product descriptions with AI, give the AI verified facts and let it handle only the wording. Collect the facts in a fact sheet, run a reusable prompt that forbids adding facts, then edit and check every claim before you publish.

• One rule holds the workflow together: the AI only rewrites facts you supply. It never supplies facts.
• Be realistic about the time saving: AI speeds up drafting, structuring and formatting. Verification stays with a human.
• It scales: the same workflow works for one product or a whole catalog.

The short answer: a 6-step workflow

What AI does well with product descriptions, and where it goes wrong

A cleverer prompt alone won't fix this. Control the inputs, then review the outputs.

Step 1: Build a product fact sheet

The fact sheet is the single source of truth. Everything the AI writes must trace back to it.

Where to get the facts

• The supplier's spec sheet and the packaging
• Your own measurements and photos
• Customer reviews and product questions
• Return reasons and support tickets

Three rules for filling it in

1. Only verified facts go on the sheet. Keep a separate note of things you would like to say ('lasts for years') until you can confirm them.
2. Write down what the product is not. If it isn't waterproof or doesn't fit a 15-inch laptop, say so. This stops the AI overclaiming, and it answers buyers' real questions.
3. Capture customer language. Reviews and questions are the best cure for generic copy. Note short phrases customers actually use, such as 'doesn't look like a school bag'. Don't paste whole reviews into product copy.

Fact sheet template (copy and fill in)

The example column uses a fictional product, the Larkfield Commuter Daypack 18L. It was invented for this guide.

Step 2: Decide the buyer, the channel and the voice

The same facts need different copy in different places. Settle three things before you prompt.

Buyer. Write one sentence about who is buying and what worries them. For example: 'An office worker who commutes by train, carries a 13-inch laptop and doesn't want a bulky outdoor-style bag.'

Channel. Your own store page, a marketplace listing, and a social post or ad each have a different format and different rules.

Voice. Write 3–5 voice rules, such as 'short sentences', 'no exclamation marks', 'speak to the reader as you', 'plain words over clever ones'. Add 1–2 existing descriptions you are happy with. These few-shot examples usually show the AI your style more clearly than a list of adjectives can.

Keep the rules and examples together in a short brand voice guide. You can then reuse it for every product and share it with anyone else who writes or reviews copy.

How the format changes by channel

Step 3: Use a reusable prompt

Copy this template and replace the parts in square brackets. Leave the rules as they are.

The prompt template

You are writing product copy for [ROLE/CONTEXT: e.g. a small online store selling commuter bags].

BUYER: [BUYER: one sentence on who is buying and what they worry about]

CHANNEL AND FORMAT: [CHANNEL + FORMAT: e.g. own store product page]

VOICE RULES:
[VOICE RULES: 3-5 short rules]

EXAMPLES OF OUR VOICE (copy the style, never the facts):
[EXAMPLE DESCRIPTIONS]

FACT SHEET:
[FACT SHEET]

RULES:
- Use only facts from the fact sheet. Do not add features, materials, numbers, uses or compatibility that are not listed.
- If information you need is missing, write [MISSING: what is needed] instead of guessing.
- Do not mention certifications, awards, health, safety or environmental claims unless they appear in the fact sheet. If they do, use the fact sheet wording.
- Do not invent reviews, ratings, customer quotes or sales figures.
- Respect the Limitations and Claims to avoid fields.
- Avoid these words and phrases in the copy: elevate, unleash, game-changer, perfect for any occasion, high-quality, premium, must-have, take it to the next level, seamless, look no further, crafted with care, versatile, stylish yet functional.
- Lead with the buyer's main problem. The first sentence should say who the product is for and its main benefit.
- Length: [LENGTH: e.g. 120-180 words plus specs]

OUTPUT STRUCTURE:
[OUTPUT STRUCTURE - default:]
1. Headline (max 10 words)
2. Intro: 2-3 sentences
3. 3-5 benefit bullets. Each starts with the benefit and names the feature that delivers it.
4. Specs list, using the fact sheet's units
5. Meta title (under 60 characters) and meta description (under 155 characters), own store only

Why each part is there

• Role/context tells the AI what kind of business it is writing for.
• Buyer points the copy at one person's problem instead of 'everyone'.
• Channel + format stops it writing a blog post when you need marketplace bullets.
• Voice rules and examples make the output sound like your brand rather than the AI's default style.
• Fact sheet is the only allowed source of facts.
• 'Use only facts' and [MISSING] turn guessing into visible gaps you can fill.
• Claim restrictions keep out the claims most likely to cause trouble.
• Banned phrases remove the most common filler before it appears. Add any phrase your own drafts keep repeating.
• Fixed output structure makes drafts easy to compare, review and paste into your store.

Save the prompt so you do not rewrite it every time

• Use the tool's saved-instruction feature. Depending on the tool and plan, this may be called custom instructions, projects or custom GPTs. Store your brand voice guide and the RULES block there. Features vary by tool and plan, so check what yours offers.
• Or keep it in a document or text expander. Paste the template, then paste the fact sheet for each product. It's low-tech, but it works with any tool.

Step 4: Generate variants, then combine

One draft is rarely the best draft. Ask for 2–3 versions, each with a different angle:

• Problem-led: opens with the buyer's frustration.
• Use-case-led: opens with a situation ('your Monday commute').
• Spec-led: opens with the most important numbers.

Then pick the strongest opening, the most specific bullets and the clearest spec list. Ask the AI to merge them ('Combine the intro from version 2 with bullets 1, 3 and 4 from version 1'), or do it by hand.

Use targeted follow-ups

'Make it better' tends to get you more adjectives. These get you better copy:

• 'Make bullet 2 more specific using the dimension from the fact sheet.'
• 'Cut the intro by 30%.'
• 'Move the limitation about laptop size into the bullets.'

Step 5: Edit for accuracy and specificity

This is the step that makes AI copy safe to publish.

Accuracy pass. Read the draft next to the fact sheet. Check every noun, number and claim. Anything not on the sheet is either removed, or verified and then added to the sheet.

Resolve every [MISSING] tag. Find the information or rewrite the sentence so it isn't needed.

How to spot invented details

These are the claims AI most often invents or exaggerates. Treat each one as wrong until the fact sheet proves otherwise:

• Precise numbers you didn't supply (battery hours, weight limits, thread counts)
• Materials ('genuine leather', 'stainless steel', 'organic cotton')
• Certifications, awards and test results
• 'Clinically proven', 'dermatologist-tested', 'hypoallergenic'
• 'Eco-friendly', 'sustainable', 'recyclable', 'plastic-free'
• 'Lifetime', 'guaranteed', 'unbreakable'
• 'Best', 'number one', and comparisons with competitors
• Compatibility claims ('fits all', 'works with every')
• 'Waterproof' when the product is water-resistant
• Performance you inferred rather than documented ('handles any weather', 'all-day comfort')

Quick check: the claim-to-source prompt

After the draft, send this follow-up:

List every factual claim in your draft: features, materials, numbers, compatibility, care, warranty and any comparisons. For each claim, quote the exact fact sheet line that supports it. If no line supports it, write UNSUPPORTED. Do not rewrite the draft yet.

Replace generic phrases with specifics

Generic copy is the 'sounds like AI' problem. The fix is the same every time: swap the vague phrase for a fact from the sheet.

The banned-phrase line in the prompt template already covers the worst offenders. Extend it with any filler your drafts keep producing.

Step 6: Make it findable without keyword stuffing

• Use the words buyers search for. Type into your store's search bar and the marketplace search box and note the suggestions. Read reviews for the words customers use. Then use those terms naturally in the headline, intro and specs. If customers say 'laptop backpack' and your supplier says 'urban carry solution', use 'laptop backpack'.
• Write a meta title and meta description for each page on your own store. The prompt above already asks for them.
• Write unique copy. Many sellers reuse the manufacturer's description. Copy built from your fact sheet and customer language gives search engines and buyers a reason to choose your page.

AI use itself is not the problem

Google's guidance on AI-generated content says it rewards helpful content however it is produced, and that using automation mainly to manipulate rankings breaks its spam policies. Google's spam policies also cover scaled content abuse: mass-producing pages with little value for users.

Accurate, unique descriptions are fine. Thin, mass-produced pages are a risk.

Structured data

Product structured data (schema) helps search engines read details such as price and availability. Many store platforms and themes add it automatically, so check your platform's documentation before touching it.

Worked example: from fact sheet to finished description

1. The fact sheet

We use the filled-in fact sheet from the template above. The fields that matter most here are:

• The 13-inch laptop sleeve
• 'Water-resistant, not waterproof'
• The 2-year warranty
• 'Certifications: none documented'
• The Claims to avoid list

2. The prompt as sent

The template from Step 3, with these placeholders filled in:

ROLE/CONTEXT: a small online store selling bags for commuters
BUYER: an office worker who commutes by train, carries a 13-inch laptop and doesn't want a bulky outdoor-style bag
CHANNEL + FORMAT: own store product page
VOICE RULES: short sentences; speak to the reader as you; no exclamation marks; plain words
LENGTH: 120-180 words plus specs
[FACT SHEET pasted in full; RULES block unchanged]

3. A typical flawed draft (excerpt)

Elevate your commute with the Larkfield Commuter Daypack. Crafted from premium waterproof materials, this stylish backpack is perfect for any occasion. Its padded sleeve fits laptops up to 15 inches, and it's eco-friendly and backed by a lifetime warranty.

What's wrong with it:

4. The edited final version

Headline: A slim 18L laptop backpack for the office commute

Intro: Made for commuters who carry a 13-inch laptop and don't want a hiking-style bag at work. A padded sleeve stops your laptop sliding around, and at 14 cm deep the pack stays slim on a crowded train. Choose charcoal, olive or sand, each with only a small embossed logo.

• Your laptop stays put: a padded sleeve holds laptops up to 13 inches. It is too small for 15-inch models.
• Keys and cards within reach: the front quick-access pocket keeps small items out of the main compartment.
• Water-resistant, not waterproof: 600D polyester with a PU water-resistant coating. Don't rely on it to keep a laptop dry in heavy rain.
• Easy with luggage: the pass-through strap slides over a suitcase handle.
• Water bottle on the side: the side pocket fits a 750 ml bottle.

Specs: 18 L · 44 × 29 × 14 cm · 640 g · 600D polyester with PU water-resistant coating · fits laptops up to 13-inch · charcoal, olive, sand · spot clean only, do not machine wash · 2-year warranty against manufacturing defects

Meta title: Larkfield 18L Commuter Laptop Backpack, 13-inch Sleeve

Meta description: Slim 18L commuter backpack with a padded 13-inch laptop sleeve, bottle pocket and luggage strap. Water-resistant, 640 g, 2-year warranty.

5. Why each edit was made

1. 'Waterproof' became 'water-resistant', with the limit stated. Overclaiming here invites soaked laptops, returns and complaints. The bullet also avoids softer inventions such as 'handles any weather', which the sheet doesn't support.
2. '15 inches' became '13 inches', and the bullet now says what doesn't fit. One customer phrase on the sheet was 'wish it fit my 15-inch'. Answering that in the copy heads off a predictable return.
3. 'Eco-friendly' and 'lifetime warranty' were deleted, and the documented 2-year warranty was used instead. Neither claim was on the sheet, and both are the kind of claim that needs evidence.
4. The filler opening was replaced with who it is for, the buyer's problem and customer language. 'Stays slim on a crowded train' comes from reviews, and the 14 cm depth on the sheet backs it up. Use customer phrases where a fact supports them, not as standalone promises.

Pre-publish quality checklist

Print this out or copy it into your task tool.

• Every claim traces back to the fact sheet
• No [MISSING] tags remain
• No health, safety, environmental or certification claims unless documented
• The first sentence names who it is for and the main benefit
• Each bullet ties a feature to a concrete benefit
• Specs are complete and consistent across variants (same units, same size names)
• No banned filler phrases; the copy could not describe a competitor's product
• Matches your brand voice and the channel's format and rules
• Search terms are used naturally, with no stuffing
• The copy is unique, not the manufacturer's text
• A second person, or you after a night's sleep, has proofread it

Writing descriptions for a whole catalog

The same workflow scales if you organise the inputs.

The batch instruction

Add this after your category prompt:

Below are [NUMBER] product rows from a spreadsheet, with the header row first. Treat each row as its own fact sheet. Write a separate description for each product, following the rules and output structure above. Start each description with the product's SKU and name. Never move a fact from one product to another. If a cell is empty, write [MISSING: field name].
[PASTE HEADER ROW AND PRODUCT ROWS]

Built-in store and marketplace tools

Built-in tools can also speed things up. Shopify Magic includes AI text generation inside Shopify, and Amazon offers generative AI listing features for sellers. Naming, features and availability vary by plan and region, so check the vendor pages.

The facts-first review applies to these tools too. They draft faster, but they don't know your product any better.

If you're comparing tools for catalog work, test them on your own products. Our guide on choosing an AI writing assistant for a small business includes a trial plan you can adapt.

Common mistakes to avoid

• Prompting with only a product name. The AI will invent everything it doesn't know.
• Publishing the first draft. Drafts are where invented details hide.
• Asking the AI to 'rewrite' the manufacturer's copy. Use it as a fact source only.
• Letting the AI invent social proof. No made-up reviews, ratings or customer counts.
• Using one description on every channel. Each channel has its own format and rules.
• Burying the specs. Buyers scanning for dimensions shouldn't have to dig.

Which AI tool should you use?

Any capable general assistant, such as ChatGPT, Claude or Gemini, can run this workflow. The fact sheet and the review matter far more than the model. Built-in store tools add convenience, not accuracy.

When choosing, look at:

• Saved instructions, so your prompt and brand voice guide load automatically.
• Batch input, meaning how well the tool handles several spreadsheet rows at once.
• Team sharing, if more than one person writes or reviews.
• Price per seat and usage limits. These change often, so check each vendor's pricing page.

For detailed criteria and a way to compare tools on your own work, read how to choose an AI writing assistant for your business.

Frequently asked questions

Will Google penalize product descriptions written with AI?

Not for being AI-written. Google Search Central's guidance on AI-generated content says it rewards helpful content however it is produced. Using automation mainly to manipulate search rankings breaks its spam policies. Accurate, unique and useful descriptions are fine. Thin, mass-produced copy is a risk.

Can I give the AI the manufacturer's description as input?

Yes, as a source of facts. Pull the facts into your fact sheet and verify them first. Don't just ask the AI to paraphrase it. The result stays generic, and any errors or unsupported claims in the original carry over.

How long should an AI-written product description be?

There is no single right length. Simple products usually need a short intro, a few benefit bullets and specs. Complex or expensive products need more detail and answers to common buyer questions. On marketplaces, follow the platform's format and check its current character limits.

How do I stop the AI from making things up?

Supply a fact sheet and tell the AI to use only those facts. Instruct it to write [MISSING: …] instead of guessing. After the draft, ask it to list each factual claim next to the fact sheet line that supports it, then verify that list yourself.

How do I make AI product descriptions sound less generic?

Feed in customer language from reviews and questions. Add one or two example descriptions in your own voice. Ban common filler phrases in the prompt. Then replace every vague phrase that remains with a specific fact, such as a size, material or use case.

Do I have to disclose that product descriptions were written with AI?

It depends on where you sell and which platforms you use, and the rules may change. Check your marketplace or platform policies and your local regulations. Whatever applies, you remain responsible for the accuracy of every claim in your copy. This is general information, not legal advice.

Can AI write a product description from a photo?

Many assistants accept images and can describe what they see, which helps with a first draft. They cannot verify materials, dimensions or performance from a photo. Treat image-based output as unverified and confirm every detail against your fact sheet.

Is a free AI plan enough for writing product descriptions?

Often, yes, for a handful of products. Paid plans tend to help with saved instructions, higher usage limits and team sharing, which matter more for a large catalog. Limits and features change, so check the vendor's pricing page.