Orphan page
What it means
Nothing on the site links to these pages. They were found only through the sitemap or a canonical tag. A page with no internal links is hard for crawlers to find and gets almost no internal link value.
How to fix it
Link to each page from somewhere relevant: a section index, a related content block, the navigation if it deserves it. If the page should not be reachable, remove it from the sitemap too, because a sitemap entry with no links is a contradictory signal.
Finding it in CrawlStat
After a crawl, open Issues and pick Orphan page. Click Show all in Pages to filter the Pages table to the affected pages, or Export affected to hand the list to whoever owns the fix. Audit ID: orphan_page.