1.6 HTTPS / security / infrastructureLowIndustry consensus
No custom 404 page
A bare default error page is a dead end for users who land on a broken link. A custom 404 that returns the correct status but offers navigation keeps people on the site.
What it is
Default error page.
Why it matters
Minor UX loss; correct 404 status still matters more than styling.
How to fix it
Add a helpful 404 with navigation; keep the 404 status.
How to find it on your site
- Visit a URL that does not exist and see what is served.
- Confirm it returns a real 404 status, not a 200, with curl -I.
- Design a helpful 404 with search and links back into the site.
- Keep returning the 404 status so the page is not indexed.
Cross-reference to ranking and citation factors
A custom 404 is a user-experience and retention improvement rather than a direct ranking factor, as long as it still returns 404.
Impact
Low. Consensus.
Evidence
Return proper 404 status; a helpful page aids UX. Google Search Central, How HTTP status codes affect Google Search