A Column Label (in a Pivot Table) determines a table column that is used to group individual table rows (i.e. records) by the unique values in that specific column. It is called a Column Label as the unique values are listed at the beginning of each column (in the first row) of the resulting Pivot Table. For example, selecting a Month of Sale as a Column Label will list all Months in the first row and next we can group the total sales.