Significance of "More Message to Send"

Hi,
In some SMS TPDU types like SMS-DELIVER and STATUS REPORT, a field called “More messages to send(TP-MMS)” is present. I know that it indicates whether more messages are waiting in the SC for the recepient MS, than the current one received.

But I would like to know why this field must be present in say SMS-DELIVER tpdu. How is it useful? Does it have particular significance in case of concatenated message?

pls help…
thanks in advance

Regards
Roy

it helps in sending multiple messages in quick succession; so, yes - that could be useful in case of concatenated message.