---
title: "404 Error"
description: "A 404 error is an HTTP status code indicating that the requested page was not found on the server, which can harm SEO if important pages return 404 or if 404 errors accumulate."
category: "Technical SEO"
date: "2026-03-05"
url: "https://getbeast.io/glossary/404-error/"
type: "glossary"
---

# 404 Error

**Category:** Technical SEO | **Updated:** 2026-03-05

A 404 error is an HTTP status code indicating that the requested page was not found on the server, which can harm SEO if important pages return 404 or if 404 errors accumulate.

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## What Is a 404 Error?
A 404 (Not Found) error occurs when a server cannot find the requested URL. This happens when a page has been deleted, a URL is misspelled, or a link points to a non-existent page. The server returns a 404 status code and typically displays a "page not found" error page to the user.

## Why 404 Errors Matter for SEO
A few 404 errors are normal and not harmful. However, **important pages returning 404** means lost traffic, lost link equity, and poor user experience. Pages with inbound links that 404 waste the equity those links provide. A sudden spike in 404 errors (after a migration or deployment) signals a serious problem that needs immediate attention.

## How to Find and Fix 404 Errors
Monitor 404 errors in Google Search Console, server logs, and by crawling your site with [CrawlBeast](/crawler/). Fix by either restoring the missing page or implementing a 301 redirect to a relevant alternative. Create a helpful custom 404 page that guides users back to working content. Analyze 404 patterns in [LogBeast](/logbeast/) to catch issues early.

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## Related Terms

- [Soft 404](/glossary/soft-404/)
- [Broken Link](/glossary/broken-link/)
- [301 Redirect](/glossary/301-redirect/)
- [HTTP Status Codes](/glossary/http-status-codes/)
- [Site Migration](/glossary/site-migration/)

## Further Reading

- [Finding and Fixing 404 Errors](/blog/404-errors/)

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*Part of the [GetBeast SEO Glossary](/glossary/). Visit [GetBeast.io](https://getbeast.io) for professional SEO and log analysis tools.*