The 301 error is an HTTP status code used to indicate that a resource has been permanently moved to another location. This means the original URL of the resource is no longer available and has been replaced by a new URL.
When a web browser receives a response with a 301 status code, it automatically redirects to the new specified URL. Search engines also record this redirect and update their indexes to reflect the new location of the resource.
The 301 error is often used when changing a website’s structure or moving a resource to a new location. Doing so ensures that old URLs continue to work and redirect users and search engines to the new resource location.
It’s important to note that a 301 error is a permanent redirect and is not reversible. If you decide to move a resource and use a 301 redirect, make sure you want the new URL to be the resource’s permanent location. If you’re unsure, you can use a temporary redirect (status code 302) instead.