When shall we use a null data-driven subscription?

Programming Language
#1

Users should first build a Null Delivery Provider-based data-driven subscription. The Report Server targets the Report Server Database as the delivery destination and utilizes a specific rendering extension called the null rendering extension when the Null Delivery Provider is chosen as the method of delivery in the subscription. The Null Delivery Provider, unlike the other delivery extensions, does not have delivery parameters that may be defined using a subscription.