A 404 error, often referred to as "404 Not Found," is a standard Hypertext Transfer Protocol (HTTP) response code that indicates a client's request to access a particular resource on a web server cannot be fulfilled. This error is commonly encountered when a user tries to access a webpage or a file that doesn't exist on the server.
The HTTP 404 error is typically displayed by web browsers when the server cannot locate the requested URL. This might happen due to various reasons:
1. The URL or path provided by the user contains a typo or is incorrect.
2. The webpage or file has been removed or deleted from the server.
3. The server is experiencing issues and is unable to serve the content.
4. The webpage or file was moved to a different location without proper redirection.
5. There might be a misconfiguration in the server settings.
When users encounter a 404 error, it means that the server understands the request but cannot find the requested resource. It's a way for the server to communicate to the client (usually a web browser) that the content they are looking for is unavailable at the provided URL.
Web developers and website administrators often customize their 404 error pages to provide helpful information to users, such as suggesting other pages to visit, providing a search bar, or explaining why the requested content is not available.
To summarize, a 404 error is a standard HTTP response code that indicates that the requested resource is not found on the server.

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