HTTP status codes are responses from a server to a browser’s request when visiting a website. They are expressed as a three-digit code and indicate the conversation between the server and the browser. Knowing how to use these codes will help in identifying and diagnosing site errors to minimise downtime. These status codes can even aid search engines and users in accessing your site. The first digit of each code ranges from 1 to 5 and indicates a different class of server response. The five classes of server response are distinguished by these digits.
HTTP status code classes that are commonly used:
- 1xx (Informational): These codes indicate that the server has received the request and is processing it.
- 2xx (Successful): These codes indicate that the server has successfully processed the request.
- 3xx (Redirection): These codes indicate that the client needs to take additional action to complete the request, such as following a redirect.
- 4xx (Client Error): These codes indicate that there was an error with the client’s request, such as a missing or invalid parameter.
- 5xx (Server Error): These codes indicate that there was an error with the server while processing the request.
The most important SEO HTTP status codes
This status code denotes a successful request, and the server is returning the requested information. The data can be in HTML, XML, JSON, or any other format that is supported. The most frequent reply for a fulfilled HTTP request is this status code. It indicates that everything is proceeding as planned and that the requested data was successfully retrieved.
301 Moved Permanently:
This status code indicates that the requested resource has been permanently moved to a new URL. When a server returns a 301 status code, it tells the client that the requested resource is no longer available at the requested URL and has been moved to a new location. The client’s browser will automatically redirect to the new URL, so the user doesn’t have to do anything.
404 Not Found:
This status code indicates that the requested resource could not be found on the server. It means that the server could not find the requested file or page, and it’s not available at the URL provided. This error can occur due to a variety of reasons, such as the file or page being deleted, moved, or renamed, or there’s a typo in the URL.
500 Internal Server Error:
This status code indicates that the server encountered an error while processing the request. It’s a generic error message that tells the client that something went wrong on the server’s end. The cause of this error can be difficult to pinpoint because it could be due to a variety of reasons, such as a bug in the server-side code, a misconfigured server, or an overloaded server.
HTTP status codes provide a way for servers and clients to communicate the status of a requested resource. Understanding these status codes can help diagnose issues and errors on a website, and provide better user experiences by improving site performance and accessibility.
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