Source: Schema.org v30.1 vocabulary. Official primaryImageOfPage property definition.
What does primaryImageOfPage mean?
Indicates the main image on the page.
Used on types (domainIncludes)
Expected value types (rangeIncludes)
Schema.org domainIncludes and rangeIncludes are descriptive guidance, not strict validation prohibitions. Check the official reference for updates.
Related reference
Browse all Schema.org types and properties · Google feature support status