Google last week introduced a new a new robots tag - indexifembedded - that enables publishers to tell Google if content should be indexed when it’s embedded through iframes and similar HTML tags in other pages, even when the content page has the noindex tag.
Google says the tag indexifembedded works in combination with the noindex tag only when the page with noindex is embedded into another page through an iframe or similar HTML tag, like object. Only Google is currently supporting the indexifembedded tag.
For example, if podcast.host.example/playpage?podcast=12345 has both the noindex and indexifembedded tag, it means Google can embed the content hosted on that page in recipe.site.example/my-recipes.html during indexing.
Until now the noindex tag prevented Google to index content that was embedded.
How to use the new tag indexifembedded?
<meta name="googlebot" content="noindex" />
<meta name="googlebot" content="indexifembedded" />