Google Limits ‘aggregateRating’ and ‘review’ Properties

Google has recently updated their Review snippet structured data guidelines to limit the Schema ‘aggregateRating’ and ‘review’ properties to only a select handful of approved Schema types.

The upcoming release of the WPSSO JSON v2.10.0 add-on will follow these new Review snippet structured data guidelines, instead of conforming to the official Schema standard, as the current version does.

If you notice a “not a known valid target type for the itemReviewed property” error in Google structured data validator results, the ‘aggregateRating’ and/or ‘review’ may be included in a non-approved Schema type.

The official Schema standard provides ‘aggregateRating’ and ‘review’ properties for these Schema types (and all their sub-types):

  • Brand
  • CreativeWork
  • Event
  • Offer
  • Organization
  • Place
  • Product
  • Service

After revising their Review snippet structured data guidelines, Google’s structured data validator now allows ‘aggregateRating’ and ‘review’ properties only for these Schema types:

  • Book
  • Course
  • Event
  • HowTo (includes the Recipe sub-type)
  • LocalBusiness
  • Movie
  • Product
  • SoftwareApplication

And the ‘review’ property for these Schema types:

  • CreativeWorkSeason
  • CreativeWorkSeries
  • Episode
  • Game
  • MediaObject
  • MusicPlaylist
  • MusicRecording
  • Organization
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