200 OK is a server response code that represents a successful load of the webpage. This is the standard HTTP status response.
301 Moved Permanently
301 Moved Permanently is a server response code used for permanent redirection. In SEO it is frequently requested as it is the ideal type of redirect for situations such as if a URL changes.
302 Found is a response code used for temporary redirection. It is less rarely requested than a 301, and is only used in situations where a redirect is known to be temporary.
404 Not Found
404 Not Found is a response that a resource cannot be found at this time. The resource may still be available in the future.
410 Gone means that a resource is no longer available, and will not be made available again in the future. This is used in situations where a resource has been removed and will not be made available again.
500 Internal Server Error
500 Internal Server Error is a generic error message that means there was a problem that prevented the web page from loading.