When web developers delete a linked page, place an incorrect URL in a text link, or change a URL address without correctly updating the URL, a broken link is created.
Broken link is an hyperlink that is leading to a page that no longer exist. Visitor then can see error page, usually with 404 error code. Webmasters aim should be to minimise number of broken links. Google may prefer webpage that is properly linked.
a broken link is a link to a page that does not exist anymore
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