what is the difference between public queue and private queue,when we use public queue and when we use private queue.

Trading Networks supports two types of scheduled delivery queues-public queues and
private queues .

1) Public queues are queues that can contain documents for multiple receiving partners.
2) Private queues are queues that contains only delivery tasks that correspond to documents aimed for a specific receiving partner. You define private queues in the profile of the receiving partner.

Thank you Venuponakala