Case study: how Mi Mercería Online rewrote 20,000+ product descriptions with AI in under half an hour

The challenge: a huge catalog with thin descriptions

A haberdashery store doesn’t sell five products: it sells threads, needles, buttons, fabrics, wool, zippers and a thousand more references, each with its variants. Mi Mercería Online has over 20,000 products, and that is exactly the problem that holds so many stores back: when you have thousands of references, writing a good description for each one by hand is simply unfeasible.

The usual result is a catalog full of pages with minimal descriptions —sometimes just the name and one line— that neither help the customer decide nor give Google the content it needs to rank. The catalog is there, but it only works at half capacity.

The solution: rewrite the whole catalog, not a sample

Instead of picking “a few important products”, the approach was to optimize the entire catalog. The AI Shop Helper product description optimizer analyzes the whole store and rewrites every page, expanding and enriching the descriptions so they are more useful and more complete, keeping consistency across the catalog.

• Without taking the store offline. There was no need to put the site in maintenance mode or disable it temporarily. The store kept selling while the descriptions were updated.
• In minutes, not months. Rewriting 20,000 descriptions by hand would be months of work for a human team. Here the job was completed in under half an hour.

The result, in the client’s words

“I decided to have Multiplicalia, through AI, fill in and expand the descriptions of my 20,000+ products, and in under half an hour it was done, without having to temporarily disable the site or anything. Now my products have longer descriptions and it has improved aesthetically quite a lot.”

— Óscar, Mi Mercería Online

Longer descriptions and a store that “has improved aesthetically quite a lot”: more complete pages improve the shopping experience and give search engines much more to work with.

Why this matters for your store

If you have a large catalog, you probably recognize yourself in this store’s starting point: good products, but half-finished pages because there is simply no time to write them one by one. That is exactly the kind of work an AI agent does well: repetitive, large-scale and with judgment.

The AI Shop Helper product description optimizer is built for WooCommerce and PrestaShop, works across the entire catalog and publishes straight to your store with your approval. It also relies on real data from SE Ranking, Google Search Console and Google Analytics to include in each page the words your customers actually search for.

Want to see what it would do with your catalog? Activate it free with 120 credits and try it with your own products.