AI-written product descriptions are good when you give the AI real facts and forbid it to invent anything. Filler like "high quality", "perfect for any occasion" or "a must-have" almost always appears because the AI knows too little and fills the gap with generic phrases. So the fix is not a better magic word in the prompt but better input: material, dimensions, origin, care, intended use. Then you proofread every text before it goes live.
Why AI texts often sound generic
A language model writes the most likely text for your request. If you only type "Write a description for a ceramic mug", the most likely text is an average of many mug descriptions. It sounds smooth but says nothing about your mug.
Worse: when facts are missing, the AI sometimes invents them. Suddenly the mug is "dishwasher safe" or "sustainably produced", although you never said so. That is not only embarrassing; wrong product claims can also become a legal issue, for example as misleading advertising.
The facts the AI needs
Before writing, collect the information a customer needs to decide. Not every item fits every product.
| Fact | Example |
|---|---|
| Material and composition | Glazed stoneware; 100% linen |
| Dimensions, weight, capacity | Height 9 cm, 350 ml |
| Production and origin | Hand-thrown in Leipzig |
| Care and use | Dishwasher safe, not microwave safe |
| What it is meant for | For filter coffee and tea |
| What sets it apart | Each piece has a slightly different glaze |
| What is included | Single mug, no coaster |
Three to five such facts are often enough for a description that stands out from competitors.
A prompt that works
Give the AI clear rules. An example you can adapt:
- Role and audience: "You write product copy for a small German online shop. Audience: people who value handmade goods."
- Facts: list the information you collected.
- Rule against inventing: "Only use the facts given. Don't invent features, certifications or benefits. If information is missing, leave it out."
- Style rules: "Address the reader directly, short sentences, no superlatives, no words like premium, perfect, unique, must-have."
- Structure: "One opening paragraph with the main benefit, then a list with material, dimensions and care."
- Length: "About 80 to 120 words."
Ask for two versions and pick the better one. Combine sentences from both if needed.
Spotting and replacing filler
Even with a good prompt, generic phrases slip through. Replace them with the fact behind them.
| Filler | Specific |
|---|---|
| High-quality materials | Made of 100% European linen |
| Perfect for any occasion | For the office and summer evenings, wrinkles visibly |
| Lovingly designed | Hand-painted, every piece signed |
| Durable | Double-stitched edges, washable at 40 °C |
| A real highlight | (delete) |
A simple test: would the sentence also be true for your competitor's product? Then it says nothing about yours.
Proofreading: the checklist before saving
- Does every statement match your facts?
- Did the AI add anything you didn't provide? Delete it.
- Are dimensions, material and care easy to find?
- Are there sales phrases or superlatives?
- Does the tone fit your shop?
- Health or environmental claims only if you can prove them.
- Does the description match title, images and category metafields?
Why specific texts also help with Google and AI assistants
Google Shopping takes the description from your product into the feed. AI assistants like ChatGPT read your product page when they make recommendations. Neither can do anything with "premium and perfect". They can with "350 ml, stoneware, dishwasher safe". Specific facts make your product findable for matching queries.
How Heartly helps
Heartly rates for each product whether description, SEO title and meta description are sufficient and shows this in the visibility score. The "Fix now" assistant (Beta, Shopify, paid plan) drafts product descriptions only from facts stated in the product. If the data is too thin, it asks you for two or three facts instead of inventing something. You review and edit every draft before saving and can undo changes for 30 days.
A before and after example
Before (no facts): "This high-quality ceramic mug is the perfect companion for every moment. Lovingly designed and a real highlight in any kitchen."
After (with facts): "Hand-thrown in Leipzig from glazed stoneware. The mug holds 350 ml and works well for filter coffee or tea. Because each glaze is applied by hand, every piece looks slightly different. Dishwasher safe, not microwave safe."
The second version is barely longer but answers the questions customers actually ask: how big, made of what, how to care for it? Search engines and AI assistants can match exactly these facts.
Workflow for many products
- Create a spreadsheet with one row per product and columns for the facts.
- Fill in the facts first, then the texts. Empty cells show you where information is missing.
- Use the same prompt for all products so tone and structure stay consistent.
- Proofread every text before pasting it into Shopify.
Plan a bit more time at the start: the first ten products take longer because you gather facts and tune the prompt. After that it gets much faster, because the spreadsheet and prompt are in place and you only review and polish.
Frequently asked questions
Does Google detect AI-written text and penalize it?
According to Google, it evaluates the quality and usefulness of content, not how it was produced. Mass-produced text without value is still a problem, whether written by a person or a machine.
Can I have AI rewrite the manufacturer's description?
As a source of facts, yes. Check whether the manufacturer allows use of its texts, and have the AI write its own text from the facts rather than just swapping words.
How long should a product description be?
As long as the facts carry it. For many products, 80 to 200 words is realistic. Short and specific beats long and empty.
Which AI tool is best?
Common models deliver similar results when the input is good. The facts and the proofreading matter more than the tool.
Check your catalog
Want to know how many of your products are affected right now? The free visibility check works without installing anything. If you want to close the gaps directly in Shopify, Heartly is in the Shopify App Store ($19 per month, 14-day free trial).