When creating a custom report to identify the best times to send your emails, what should you select for your secondary data sources?

HubSpot’s custom report setup for best send-time analysis uses Marketing email analytics as the primary data source and Marketing email as the secondary data source. The secondary source provides email-level details that support reporting on marketing email performance. This pairing allows the report to connect analytics metrics with the related marketing email records. Fields such as delivered date and hour of day are used later to structure the report, not as data sources.