How to Write Product Descriptions With AI

Writing a product description looks like a minor task until you have forty products in the catalog. Then it becomes a writing job with a deadline that never arrives, and the catalog fills up with descriptions that repeat the manufacturer's specification in slightly different words.

The descriptions that sell do something narrower. They answer the questions a buyer asks in the thirty seconds before deciding, in the order the buyer asks them, and they stop. AI handles the typing well, provided you supply the facts it cannot invent.

The 12 prompts below cover the research, the writing and the repetition across a catalog. The checklist at the end is the part to run before anything goes live.

Key takeaways

• A description sells by removing doubt, not by listing features.
• Six parts carry almost every product: summary, problem, specification, objection, proof and next step.
• Specific measurements and materials do more work than adjectives.
• One voice across the catalog builds trust, and it comes from a written brief rather than from luck.
• AI writes the first draft, and you supply the facts and the judgment about what matters.

What makes a description work

Buyers skim, and they stop when a sentence answers a question they were already carrying in their head. That is why the opening line matters more than the rest of the text together, and why a description that begins with a brand story loses the reader before reaching the specification.

The specific detail is the other essential lever. A description that says a bag holds 22 liters tells the buyer something, while a description that calls it spacious tells them nothing, because every competitor writes the same word. Precision is also harder to fake, which is why it reads as credible.

The order of the parts matters as much as the parts themselves. A buyer confirming a decision reads the summary, checks the specification and looks for a reason to hesitate, so placing the objection after the specification answers the doubt at the moment it appears.

The 12 prompts

Each prompt is a complete request. Replace the brackets, and paste in the raw product facts rather than a description of the product.

Before you write

1. Build the product brief

You are a product marketer. I will describe a product in rough notes: [paste notes].
Turn them into a structured brief with six sections: what it is, who it is for, the problem it solves,
the specification, the likely objection, and the proof we can show.
List anything you need me to confirm before writing.

2. Identify what buyers actually ask

Act as a customer support agent for a store selling [product category].
List the twelve questions customers ask most often before buying, in the order they usually ask them.
Group them into three categories: specification, compatibility and delivery. Keep each question under 12
words.

3. Find the objection

You are a conversion copywriter. Here is a product listing: [paste description or key details].
Identify the three strongest reasons a buyer would hesitate, rank them by how often they occur, and
suggest one factual sentence that answers each. Do not invent reviews or statistics.

Writing the description

4. The main description

You are a copywriter for an online store. Write a product description for [product] using these
facts: [paste specification, materials, sizes and price].
Use this structure: one-line summary, the problem it solves, the specification in a short list, the main
objection with an answer, and one next step. Under 220 words in total.

5. The one-line summary

Act as a copywriter. Write eight alternative opening lines for a product description of [product].
Each under 14 words. Each must contain one concrete detail such as a measurement, a material or a use
case. No adjectives that every competitor could claim, and no exclamation marks.

6. The specification section

You are a technical writer for an online store. Turn these product details into a specification
list for a product page: [paste raw specification].
Use plain language, give units in both metric and imperial where relevant, group the list under three
subheadings, and flag any specification that is ambiguous or missing.

7. Turning features into benefits

Act as a copywriter. Here is a feature list for [product]: [paste features].
For each feature, write one sentence explaining what it changes for the buyer in daily use. Keep the
sentences under 20 words, and do not add a benefit you cannot support with the feature given.

8. The short version for category pages

You are a copywriter for an online store. Write a short product summary for a category listing
page, for [product].
Under 35 words. Lead with the most decision-relevant fact, include one specific detail, and end without a
call to action. This text sits next to twenty other products, so it must be distinguishable.

Scaling across a catalog

9. One voice across many products

Act as a brand copywriter. Here are three existing product descriptions we like: [paste three].
Extract the house style in a one-page brief: sentence length, tone, structure, words we always use and
words we avoid. Write the brief so a new writer could follow it without examples.

10. Apply the brief to a new product

You are a copywriter working to this house style brief: [paste brief].
Write a product description for [product] using these facts: [paste facts]. Stay inside the brief. When
the facts are insufficient for a section, write the question you need answered instead of filling it in.

11. Rewrite a description that does not convert

You are a conversion copywriter. Here is an existing product description: [paste text].
Rewrite it to the six-part structure: summary, problem, specification, objection, proof and next step.
Keep every factual claim from the original, remove any claim that cannot be supported, and note what you
removed and why.

12. Check consistency across a batch

Act as an editor. Here are [number] product descriptions from the same store: [paste them].
Compare them against each other and report: differences in tone, repeated phrases, inconsistencies in
formatting or units, and any product description that is missing one of the six parts.
Give the findings as a short list, not a rewrite.

A checklist before you publish

Run these six checks on every description before it goes live. They catch nearly all of the problems that reach customers.

Check	What you are looking for
Facts	Every measurement, material and compatibility claim matches the actual product
Claims	No promise about results, durability or delivery times that you cannot support
Opening line	Contains one concrete detail, and could not describe a competitor's product
Objection	The most common hesitation is answered in the text, not left to the FAQ
Length	Reads in under a minute on a phone, with the specification as a scannable list
Voice	Sounds like the rest of the catalog, with the same units and the same structure

Which pack covers ecommerce

Every prompt above works on its own. If you would rather start from a library built for online stores, this covers the same ground with the structure already prepared.

What it does	Ready-made pack
Product descriptions, category pages and store copy	Carto, Ecommerce Website Assistant
The full catalog of trade and marketing packs	Browse the shop

Every pack is a one-time payment with instant download that operates in ChatGPT, Claude and Gemini.

Questions we get asked

Will AI descriptions look the same as everyone else's?

They will if you feed the model the manufacturer's specification and nothing else, because that input is identical for every store selling the same item. They will not if you add your own facts: the customers you serve, the use case you see most often, and the detail your support inbox tells you matters.

How long should a product description be?

Long enough to answer the questions, and short enough to read on a phone in under a minute. That is usually between 150 and 250 words for a considered purchase, and under 60 for a simple one. The specification belongs in a list rather than in paragraphs, because buyers scan it rather than read it.

Should I write different descriptions for each sales channel?

The core description can travel, and the opening line should change. A marketplace listing competes beside twenty similar products while your own product page has the buyer's attention, and the first line is where that difference shows.