Optional
Publisher staleness window in milliseconds. When omitted, the pool applies Google's published guidance for the format (four hours for app open, one hour otherwise) and records that source on each handed-out ad. Not the SDK's cache timeout.
Publisher staleness window in milliseconds. When omitted, the pool applies Google's published guidance for the format (four hours for app open, one hour otherwise) and records that source on each handed-out ad. Not the SDK's cache timeout.