Analysis of Google's New Schema Speakable Markup - Search Engine Journal

Google announced official support for the Schema.org The speakable specification will help Google Assistant and Google Home choose which content to read aloud. This new structured data markup is important because it may point to what you'll need to know to get more traffic should/when Google expands this structured data to all websites. The support for this new markup is currently limited to News content. However, it is likely that support for the speakable attribute will inevitably expand as Google gains experience with this new structured data markup.