SEO for manufacturers: the specification searches engineers make, and the product pages that answer them

SEO for a manufacturer is mostly the work of answering specification searches. An engineer types a material, a size, a standard or a rating, and the page that shows that figure as text, correct and traceable to your own datasheet, is the page that gets read and put on the shortlist. The product pages that win carry the specification table in HTML, one page per product family with its variants in the table, the standards with their numbers, and a direct route to a drawing, a sample or a quote. The quickest way to lose the search is a page whose figures disagree with your datasheet.

How an engineer's search reads

Specification searches look odd next to the searches most SEO advice is written for. They are long, full of numbers and units, and each one is made a handful of times a month: a grade and a bar diameter, an enclosure rating and two dimensions, a thread size and a material, a flow rate and a pressure. Keyword tools often show no volume for them at all, which is how manufacturers come to be told that nobody searches for what they make. Search Console tells a different story, because it lists the exact queries that already showed your pages, however few times.

Open the query report and filter it with a regular expression for any digit; Search Console's performance report has a custom regex option for queries. The rows that remain are the specification searches you already appear for, usually at positions no engineer scrolls to, and each one names the figure your page should have shown higher up. The work is to build the page that answers them, not to chase the two-word head term a large catalogue already owns.

One source for every figure

The rule we hold to on product catalogues is that every specification comes from the manufacturer's own sheet. On an air-conditioning retailer's catalogue in Bulgaria that we look after, every product's figures are taken from the maker's datasheet, never from another reseller's listing. It is slower. It also means any figure on the page can be traced to its source, which a copy of a copy cannot promise.

For a manufacturer the same rule points inwards, because you are the source. The datasheet, the product page, the PDF, the table you send distributors and any structured data should all carry the same figure, and when engineering revises one, every copy changes on the same day. A page that gives one rating while the PDF gives another does more harm than a missing page: the engineer who notices stops trusting both, and the distributor working from last year's sheet keeps the old figure until someone tells them.

Put a revision date on the specification table. It tells the engineer which version they are reading, and it gives your own team a way to check every copy against the current one.

The product page that answers a specification search

One page per family, or one per part number?

Usually one page per product family, with the variants in its table. Forty pages that differ only in one dimension fit what Google's spam policies describe as creating substantially similar pages that are closer to search results than a clearly defined, browseable hierarchy, and Google tends to keep a few such pages and drop the rest. The exception is a variant with searches of its own: if the query report shows engineers typing a particular part number or size often enough, that variant earns a page with its own figures, its own drawing and a link back to the family.

Town pages are rarely the answer

It is tempting to build a page for each town within an hour's drive: precision machining in one town, then the next. An engineer choosing a supplier for a specification rarely searches that way, and the pages end up saying the same thing with the town changed. Google's spam policies name the pattern: pages targeted at specific regions or cities that funnel users to one page are listed as doorway abuse.

Even where town pages make sense, they should not invent local colour. The air-conditioning retailer has ten town pages, and we built them from one form with no invented local differences; we refused copy about different winters for towns 35 kilometres apart, because it would have been made up. For a manufacturer, one honest page on where you deliver, your lead times by region and whether you visit sites does the job the town pages were meant to do.

Structured data, PDFs and discontinued parts

Google's documentation for product snippets needs the product's name plus one of a review, an aggregate rating or an offer, and an offer needs a price. A manufacturer that quotes per order and shows no reviews qualifies for none of the three, and the temptation is to add a rating to fill the gap. Do not: Google's structured data guidelines say not to mark up content that is not visible to readers of the page. Mark up what the page shows and stop there.

Keep the PDFs. Google lists PDF among the file types it can index, and engineers want the file to keep. But the PDF is the second copy, not the page: the figures belong on the HTML page first, where they load on a phone, sit under a title of their own and lead to the next step.

When a product is discontinued, send its URL somewhere true: a 301 to the successor if there is one, otherwise a 404 or a 410, which Google's documentation on status codes says it treats the same way. Never leave an ordinary page that pretends to redirect; the retailer's catalogue taught us that in September 2026, when Google indexed a removed product's meta-refresh stub, served by our build because we did not control the server's redirects, and began showing it in place of unrelated products.

If your query report already shows specification searches at positions nobody reaches, those are the cheapest gains a manufacturer has. Our SEO for B2B and manufacturing page explains how we run that work, and the worked example of an engineering firm's decision memo shows how we would put the choice to a managing director. The quote form takes the site address and the product lines you most want enquiries for.