Found in the Customer Core dataset this is stored against each Customer and is either TRUE or FALSE. This attribute has a pessimistic view of the Customers subscribed status. It is only TRUE if the Subscribed status is TRUE where that Customer is found in all datasets. Thus if a Customer has a single FALSE status in any dataset, this will also read FALSE.
In the Single Customer View data view there is also an additional roll up value, GDPR Subscribed Count. This is a count of the Subscribed statues. An example value would be 1 of 9. This means that the Customer has been found to have a single TRUE in amongst 9 data source values. This is an indicative value and cannot be used in Segmentation.