A business card website is the smallest site that still works for a business: a few pages about the company, its services and its contacts, with a form for requests. It suits a new company, a specialist or a small team that clients check before calling, and that should come up in Google and on the map.
We build it on the same stack as our larger projects, Next.js and React, so it opens fast on a phone, carries technical SEO from the first day and can later grow into a corporate website by adding pages and languages instead of starting over. You get the source code and every access; the site stays yours.