https://www.schema.org/ParentAudience
ParentAudience - Schema.org Type
Schema.org Type: ParentAudience - A set of characteristics describing parents, who can be interested in viewing some content.
schematype
https://developers-dot-devsite-v2-prod.appspot.com/workspace/gmail/markup/reference/types/ParentAudience
ParentAudience | Gmail | Google for Developers
gmail googledevelopers