Definition
An orphan page is a page on your website that no other page on your site links to. The page exists and is reachable through its direct URL, but a visitor or crawler who starts clicking from the homepage never gets there. Often the page is still in the XML sitemap, so Google knows about it but treats it as unimportant.
Orphan pages almost always appear by accident. A product is removed from its category but stays online; a campaign landing page is never added to the navigation; a blog article loses its links after a redesign; an old language version is left behind after a migration. In large webshops and on sites with many editors, the numbers quickly grow into the hundreds.
The problem is twofold. Search engines use internal links to discover pages and to decide how important they are: a page without incoming links receives no authority and is rarely crawled, so it ranks poorly or is not indexed at all. And visitors do not find it, so the content delivers nothing. The same applies to AI engines: their crawlers follow links, and what they cannot find, they cannot cite.
You find orphan pages by comparing two lists: all URLs you know about (from the sitemap, the CMS, Search Console, analytics and server logs) and all URLs a crawler reaches from the homepage. Whatever is in the first list but not the second is an orphan. Tools such as Screaming Frog do this when you connect the sitemap and Search Console.
The fix is a decision per page: link to it from a relevant page (category, related article, hub) if it has value, redirect it to the best replacement if it is redundant, or remove it (410) if it no longer adds anything. Traze checks at every publication that the new page receives at least three contextual incoming links and flags existing orphans in the technical scan.