The Custom Columns feature allows you to report on other data in your order export CSV file; we'll generate monthly and overall revenue and order charts for this data. Typically our users may use this on columns like 'Payment Method', 'Shipping Method' and so on to get a beautiful visual representation of the performance of different options in these areas. Reports on 'Custom Columns' can only be generated if the column
you specify contains more than 1 and no more than 250 distinct values.