Used for return value only. Represents value unknown in this version.
Data Type: STRING. The advertiser's phone number to append to the ad.
Data Type: STRING. Uppercase two-letter country code of the advertiser's phone number.
Data Type: BOOLEAN. Indicates whether call tracking is enabled. Default: true.
Data Type: INT64. The ID of an AdCallMetricsConversion object. This object contains the phoneCallDurationfield which is the minimum duration (in seconds) of a call to be considered a conversion.
Data Type: STRING. Indicates whether this call extension uses its own call conversion setting or follows the account level setting. Valid values are: USE_ACCOUNT_LEVEL_CALL_CONVERSION_ACTION and USE_RESOURCE_LEVEL_CALL_CONVERSION_ACTION.