200
This HTTP 200 OK success status response code indicates that the request was successful.
For a webpage to be indexed by Google, it must return a 200 status code. This is typically what you're looking for on a webpage so it can receive organic traffic. This is the default code set by Next.js when a webpage is successfully rendered.
301/308
The HTTP 301 Moved Permanently redirection indicates that the requested resource has been permanently moved to a new URL. This is the most common type of redirection, primarily used to preserve access for users and search engines.
You can also use the key set in permanent: true in next.config.js for redirection.
302
The HTTP 302 Found redirect status code indicates that the requested resource has been temporarily moved to the target URL.
In most cases, a 302 redirect should be a true 301 redirect. However, this may not be the case if you are temporarily redirecting users to a specific page (such as a promotional page) or redirecting based on user location.
404
This HTTP 404 Not Found client error response code indicates that the server cannot find the requested resource.
As mentioned above, after a page migration, a redirect using the HTTP 301 status code should be performed to the new location. If no redirect is performed, the URL may return a 404 status code. By default, the 404 status code is not necessarily bad, as returning a status code is expected if a user accesses a non-existent URL. However, status code errors should not appear frequently on a page, as this may lead to a drop in search engine rankings.
