The site exists, it looks fine, and it's nowhere to be found when someone searches for exactly what you do. For manufacturers and service firms the cause is almost always one of four things, and three of them are an hour's fix.
The site talks about you, not the buyer's problem
"Company X has been in business since 1998" doesn't answer anything anyone types into a search box. People search "CNC metal machining Zagreb" or "gasket supplier for food industry", not the name of a company they don't know yet. Headings, subheadings and the opening line need those same words — plainly, without inventing new terms for things buyers already call something else.
The site is slow or doesn't work on mobile
Google measures load speed and mobile usability before deciding who to show a page to. Heavy photos, slow hosting, and a layout that needs zooming on a phone all push you down the list, no matter how good the content is.
Nobody else mentions you
Google and AI search engines weigh whether you can be trusted. If your website is the only place on the internet where anyone mentions your company, that's a weak trust signal — however well the page is written. Listings in chamber and trade directories, mentions in local press, a profile on a relevant industry platform — all of that builds a reason to be recommended.
The site was never submitted to search engines
Sounds minor, but it's common: a site gets built and published, but never formally submitted to Google Search Console or Bing Webmaster Tools. Without that, search engines can take months to find it on their own — and some AI tools (ChatGPT search among them) partly rely on Bing's index, not just Google's.
The first cause is the most common and the most expensive to ignore, but most sites carry more than one at once.