primaryType property

The primary type of the given result.

This type must be one of the Places API supported types. For example, "restaurant", "cafe", "airport", etc. A place can only have a single primary type. For the complete list of possible values, see Table A and Table B at https://developers.google.com/maps/documentation/places/web-service/place-types. The primary type may be missing if the place's primary type is not a supported type. When a primary type is present, it is always one of the types in the types field.