Broken Pages (4Xx Errors)
What does this report contain?
URLs that return a 4xx status code, such as a 404, indicating a valid page could not be returned by the server because it doesn't exist.
How can this report be used?
These are often caused because a page has been removed but is still linked, or because the linked URL is incorrect. The solution is to update the links to point to an alternative target or remove the link if there is no suitable alternative. If the linked page has been deleted, it could be 301 redirected to an appropriate alternative.