Recently, a large number of Google Search Console notifications were sent out to those webmasters who have implemented hrefland incorrectly on their websites.
The subject of the mail read “Incorrect Hreflang Implementation on ____”
This is a screenshot of the mail that was sent out:
The mail read:
“Google had detected that some pages on your site have implemented the rel-alternate-hreflang tag incorrectly. In particular, there seems to be a problem with incorrrect language and region codes, or incorrect bi-directional linking (if page A links with hreflang to page B, there must be a link back from B to A as well). Google uses the hreflang attributes to serve the correct language or regional URL to the right users in search results.
Until you correct the errors on the hreflang links, your website will not benefit from additional language or region targeting.”
When asked about the same, this was what Google’s Webmaster Tools Trends Analyst, Gary Illyes, tweeted:
Gary didn’t know the exact number, but he said that it seemed that every webmaster he knew had received a notification.
If you have received this mail, then it means that you need to resolve the issues to benefit from the “additional language or region targeting” that is offered by hreflang.