When a request is made to your server for a page on your site (for instance, when a user accesses your page in a browser or when Googlebot crawls the page), your server returns an HTTP status code in response to the request.
This status code provides information about the status of the request. This status code gives Googlebot information about your site and the requested page.
Some common status codes are:
200 – the server successfully returned the page
404 – the requested page doesn’t exist
503 – the server is temporarily unavailable
A complete list of HTTP status codes is below. Continue reading