What Does a 404 Error Mean? Explained

A 404 error is a standard HTTP status code that appears when a web server cannot find the page a user or search engine is trying to access. It typically happens when a page has been deleted, moved without a proper redirect, or when a URL was typed or linked incorrectly. For businesses, understanding and managing 404 errors matters because they directly affect user experience and SEO performance. 

This blog breaks down what causes 404 errors and how they differ from other error codes.

What Is a 404 Error?

A 404 error is an HTTP status code indicating that the server could not find the requested resource.

In simple terms:

The URL you're trying to access doesn't point to a page that currently exists at that location.

For example, imagine your website has this page:

example.com/seo-guide

Later, the page is deleted or moved to:

example.com/seo-guide-2026

Anyone visiting the old URL may receive a 404 response.

A browser or website may display messages such as:

• 404 Not Found

• Page Not Found

• The requested URL was not found

• Sorry, this page doesn't exist

What Causes a 404 Error?

Is a 404 Error Bad for SEO?

Not necessarily.

A 404 response is not automatically an SEO problem. If a website page does not exist and no suitable replacement is available, returning a 404 can be the correct response.

Compare These Situations

The key isn't to eliminate every 404. It's to identify unnecessary 404s and handle them correctly.

How 404 Errors Affect User Experience

Imagine a visitor clicks on a link from one of your blog posts. And that link leads to a page that says:

"404 — Page Not Found."

The visitor now has to go back, search again, or leave your website.

Repeated experiences like this can create:

• Frustration

• Poor navigation

• Lost conversions

• Lower trust

• Missed content opportunities

A custom 404 page can help by giving visitors useful options.

For example, include:

• Homepage link

• Search function

• Main navigation

• Popular articles

• Relevant categories

• Contact information

404 vs 301 Redirect: What's the Difference?

One of the most common doubts in SEO is whether a missing page should return a 404 or redirect to some other page. 

Use a 404 When:

• The page genuinely no longer exists

• There is no suitable replacement

• The content was intentionally removed

Use a 301 When:

• A page has permanently moved

• A URL has changed

• A relevant replacement page exists

You want users reaching the old URL to find the new resource

Before you decide, ask the following:

• Was the page moved?

• Is there a relevant replacement?

• Is the old URL still receiving valuable traffic?

• Does another page satisfy the same search intent?

• Should the URL simply remain a 404?

Should You Redirect Every 404 Page?

No.

Redirecting every missing URL to your homepage is a bad SEO strategy. 

Suppose you permanently removed:

example.com/old-product, and there is no comparable product or replacement page.

Sending every visitor to your homepage will create a poor user experience. This is because the destination page doesn't satisfy the user’s original intent. 

Instead, ask the following:

• Was the page moved?

• Is there a relevant replacement?

• Is the old URL still receiving valuable traffic?

• Does another page satisfy the same search intent?

• Should the URL simply remain a 404?

How to Find 404 Errors on Your Website

Finding broken URLs is an important part of technical SEO.

You can use several methods:

How to Fix a 404 Error

The correct answer depends on the reason for the error. 

1. Restore the Missing Page

If a valuable page was deleted accidentally, restore it at the original URL.

This is often the simplest solution when the content is still relevant.

2. Add a Relevant 301 Redirect

If you have moved your content to a new URL, redirect the old one to a correct replacement. 

Avoid redirecting unrelated pages simply to eliminate a 404.

3. Update Broken Internal Links

Update the links that point to a missing page. 

Here’s an example:

Broken:

example.com/seo-tips

Correct:

example.com/seo-guide

This allows visitors and crawlers to reach the intended destination directly.

4. Remove Unnecessary Links

If a page no longer exists and there is no useful replacement, remove internal links pointing toward it.

5. Keep the 404 When Appropriate

Many times, the correct solution to a 404 error is to do nothing. 

If a website page is permanently gone and no replacement is available, allow the URL to return a 404. It can be perfectly reasonable. 

How RankyFy Helps Find 404 Errors

Finding broken URLs manually becomes increasingly difficult as a website grows.

RankyFy can help make technical SEO auditing more systematic by analyzing your website and highlighting issues that may affect its overall SEO health.

Its broader website audit workflow can help SEO teams investigate areas such as:

• Broken links

• Crawlability

• Technical SEO

• Internal linking

• Redirects

• On-page optimization

• Page performance

• Website structure

This means you can investigate 404-related problems alongside other technical SEO issues instead of treating them as isolated errors.

A Simple RankyFy Workflow

What Other SEO Issues Should You Check Alongside 404s?

A website audit shouldn't stop at broken URLs.

Common 404 Mistakes to Avoid

Neglecting Broken Internal Links

Identify and fix any broken internal links on your website.

Redirecting Everything to the Homepage

A homepage isn't a relevant replacement for every deleted URL.

Deleting Pages Without Value Checking 

Always check the organic traffic, backlinks, and conversions before removing a page. 

Forgetting Website Migrations

Any URL changes due to site redesigns, migrations, etc can create a large number of 404 errors. Always plan redirects in advance. 

Treating 404s as a Security Problem

The reason you get a 404 error is that the requested resource was not found. It doesn’t protect sensitive information or prevent unauthorized access. 

404 Error Checklist

Use this checklist during your next technical SEO audit:

Last Thoughts

A 404 error might seem like a minor technical detail. But when left unmanaged, it can quietly damage both user experience and search engine rankings. Regular monitoring keeps a website running smoothly for both visitors and search engines. For businesses that want to catch these issues before they impact traffic, RankyFy offers a complete set of tools. It identifies broken links, crawl errors, and indexing problems from a single, centralized dashboard. Instead of manually checking every page, teams can rely on RankyFy to flag 404 errors and other technical issues as they arise.

Ready to keep your website error-free? Try RankyFy today and stay ahead of technical SEO issues before they affect your rankings.