What is what does delivery report requested mean?

When a delivery report is requested, it means that the sender of a message or email wants to receive a notification confirming that the message has been successfully delivered to the recipient. This notification usually includes details such as the time of delivery and the recipient's details. It is a useful feature for ensuring that important messages have reached their intended destination, and for tracking the progress of communication. However, it does not necessarily confirm that the message has been read or understood by the recipient.