Using structured data to establish these relationships can streamline Google’s ability to assess the E-A-T of a given page, website, or entity because it can help: Reduce ambiguity among entities.

There is a great deal of structured data that Google’s developer pages do not discuss but is nevertheless available. Google doesn’t discuss it because there is no rich result associated with it.

This is particularly helpful when grouping related items (for example, a recipe with a video and reviews). Individual items: When each item is a separate block on the same page.

Google has updated its structured data documentation to now use hashtags for @id references. If you don't use hashtags, it is fine, but Google said it is "schema best practice to use hashtags as ...

Profile page structured data. The new profile page structured data and markup is for any site where creators, either people or organizations, share first-hand perspectives.