Definition of error 404: Everything to Understand the Meaning of This Page Not Found
A 404 error appears when the page you are trying to access cannot be found on the server.
This usually happens when the URL is incorrect, the page has been moved, or it has been deleted.
Understanding this error is important because it does not always mean a website is broken.
In most cases, it simply means the content you are looking for is no longer available at that specific address.
To improve your experience, you can return to the homepage, use the navigation menu, or try searching for the information you need. Websites often provide helpful links on 404 pages to guide you back to relevant content quickly.
What Is a 404 Error?
A 404 error, also known as a “404 Not Found error,” is an HTTP error code that indicates the requested page could not be found on the server.
In other words, the link or URL you are trying to visit does not point to any valid content.
📌 Technical definition: The HTTP 404 code is a standard response of the HTTP protocol indicating that the client was able to communicate with the server, but that the server could not find what was requested.
Meaning of the 404 Error
| Element | Meaning |
|---|---|
| Code | 404 |
| Full Name | HTTP 404 Error – Not Found |
| Error Type | Client-side error (browser) |
| Origin | Deleted page, incorrect URL, broken link |
| Consequence | Page not found, poor user experience |
Why does a 404 error occur?
The most common causes are:
🔗 Broken or outdated link
🧹 Page deleted without a redirect
🧾 Typo in the URL
⚙️ Server or CMS configuration issue (WordPress, Apache, etc.)
📤 File moved or renamed
Why does a 404 error occur?
There are several solutions depending on your situation:
✅ For Users:
🔹 Check the URL you entered.
🔹 Go back to the website homepage.
🔹 Use the site’s internal search engine.
✅ For Webmasters or Website Owners:
🔹 Redirect old URLs to new ones (301 redirect).
🔹 Remove or fix broken links.
🔹 Create a useful and user-friendly custom 404 page.
🔹 Use tools like Google Search Console to identify errors.
Example of a custom 404 error page
| Recommended Elements | Example |
|---|---|
| Clear message | Oops! The page you are looking for no longer exists. |
| Link to homepage | Button 'Back to home' |
| Search bar | To help the user find what they are looking for |
| Attractive design | Humorous illustration or simple image |
| Tone adapted to your audience | Serious, professional or humorous |
What to do if the 404 error comes from Google?
Have you noticed a 404 error in Google Search Console? This means that Googlebot could not find a page that it previously indexed.
Solutions:
🔹 Fix or redirect the affected URL.
🔹 Update your sitemaps.
🔹 Check internal links and backlinks.
How to fix the “404 Page Not Found” error?
A 404 error means that a page on your website cannot be found. To fix it for free, here are the steps to follow:
1. Identify 404 errors
Use free tools such as:
🔹 Google Search Console
🔹 Screaming Frog (free version up to 500 URLs)
🔹 Broken Link Checker (online tool)
2. Redirect missing pages
🔹 If the page no longer exists, create a 301 redirect to a similar page or to the homepage.
🔹 On WordPress, you can use a free plugin like Redirection.
3. Fix broken internal links
🔹 Go through your site and update links that point to 404 pages.
4. Recreate the page if needed
🔹 If the page was important for SEO or users, you can restore it.
5. Create a custom 404 page
🔹 Provide a clear and useful error page with a link to the homepage or popular pages.
Why is Google showing a 404 error?
This can happen for several reasons:
🔹 The page was intentionally or accidentally deleted.
🔹 The URL was changed without setting up a 301 redirect.
🔹 An internal or external link points to the wrong address.
🔹 A temporary server issue prevents access to the page.
Useful links and tools
| Tool / Website | Use |
|---|---|
| Google Search Console | Identify 404 errors |
| Screaming Frog | Scan the pages of a website |
| Ahrefs / SEMrush | Find backlinks pointing to 404 pages |
| Redirection (WordPress plugin) | Easily manage redirects |
SEO optimizations to remember
✅ Create a custom 404 page with useful links
✅ Avoid redirect chains
✅ Keep internal links up to date
✅ Remove unnecessary 404 errors to improve user experience
✅ Use data from Google Search Console
The 404 error, a simple issue to master
A 404 error can harm user experience and SEO if it is not properly managed.
Fortunately, by clearly understanding its meaning, causes, and solutions, you can effectively prevent it and maintain a high-performing, well-optimized website.
SEO Resources:
🔹 404 errors (“Page Not Found”)
🔹 Other essential SEO terms to know
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SeoYass
I am SeoYass, an SEO expert with over 15 years of experience. I have worked with small and medium-sized businesses, successfully completing more than 350 projects.
Passionate about local SEO, I continue to learn and refine my strategies to deliver the best possible performance for my clients.