Most stores import product data from a supplier feed and publish it. The titles, the descriptions and the specifications arrive already written, which saves an enormous amount of time and quietly removes the store's ability to rank.
The problem is not that the copy is bad. It is that it is identical to the copy on every other retailer selling the same product.
On a marketplace the same problem has a different shape, because everybody is on one detail page rather than forty: the difference between running a
Shopify catalogue and an
Amazon one. When forty retailers publish the same paragraph about the same product, Google has to pick which of them to show. It cannot pick on the basis of the description, because they are the same, so it picks on everything else: domain authority, links, site quality, and whatever else it has.
A newer or smaller store loses that comparison every time. Not because it did anything wrong, but because it gave Google no reason to prefer it.
It has two jobs and the supplier's copy usually does neither. It has to answer the questions that stop somebody buying, and it has to contain the words people actually use when they search for this thing.
The questions are knowable. They are in your customer service inbox, in the reviews on competing products, and in the questions section of a marketplace listing for the same item. Those are the paragraphs worth writing.
The words are knowable too, and they are frequently not the manufacturer's words. A supplier writes "thermal regulation membrane" and customers search for "waterproof breathable".
Not all of them, and this is where most rewriting projects fail. A store with four thousand products cannot rewrite four thousand descriptions, so it rewrites nothing.
Start with the products that already get impressions and few clicks, which Search Console will show you. Those are pages Google is already willing to show and buyers are not choosing. Then the products with the most commercial demand behind them regardless of current performance.
Everything else can keep the supplier copy indefinitely. A long tail of products nobody searches for is not a ranking problem.
There is a real exception worth naming. Specifications should be identical to the supplier's, because they are facts and inventing variation in them is how a store ends up publishing the wrong dimensions.
Structured specifications also belong in
structured data rather than in prose, where they can be read by search engines and by assistants answering a question about the product. That is a separate job from the description and is frequently the one delivering the visible result, because it is what puts a price and availability into the search listing.
Both are part of
our Shopify SEO work, and the structured data is usually quicker to fix than the copy.