This section finds pages hreflang tags and identifies tags that link to broken pages.
Hreflang tags are used on websites that include localized content in order to target users by language and country. The hreflang tag is implemented in the <head> of a page:
Broken hreflang could result in pages targeted for one geography being served to users in a different location, or a page being displayed for users that don’t speak its language. This, of course, would have a negative effect on user experience and SEO.