A dead-end page is a page with no links to other web pages. Users can only go back to this kind of page.
Users usually feel lost on such pages and leave the website due to poor user experience. Therefore, dead-end pages should be better avoided.
Common Examples of Dead-End Pages
Blog Posts
Blog posts may have no internal links or call to action if the author did not care much about further user experience. It is good to add CTAs (more like read more or leave your email and learn more. Not just let me know what you think about it in the comments) and related articles.
No Results
When a user has used internal search and nothing matches his inquiry, they usually just see the text and menu. Webmasters can change it by adding related categories, top searches, or search suggestions.
404 Page
If the link is broken, people are likely to see the “page not found” result. You can leave a funny message there and links to the top-performing content to avoid dead-end.