This key figure indicates the net (or delta) unit sales due to seasonality, independent of all other causal factors such as promotional uplift. Note that the effect of seasonality does not include the effect of holiday.

For more information about holiday effect, see the key figure Net Unit Sales Due to Holidays.

This quantity can be combined with other delta unit sales quantities to determine the expected unit sales including the effect. For example, adding the net seasonal units to the base unit sales quantity calculates the expected unit sales in which the effect of seasonality has been taken into consideration.