What column is needed to add a mirror column?

To add a mirror column in $Monday.com, the connect boards column is essential. The mirror column serves as a way to display information from another board, allowing users to view and reference data without duplicating it. When the connect boards column is created, it establishes a connection to another board, enabling the subsequent addition of a mirror column that retrieves and displays specific information from the linked item on that other board. This functionality is particularly useful in scenarios where teams work on related projects or tasks, as it fosters real-time data visibility and collaboration across different boards. The other column types mentioned do not facilitate this specific connection required for a mirror column, underscoring the necessity of the connect boards column in this context.