Your queue is the order in which you are to call your leads. Your queue consists of new, scheduled, and postponed leads, except those claimed by other agents.
The system constantly and dynamically calculates queues to ensure that you don't call leads claimed or currently being called by other agents.
You can say that each agent has their own personal, dynamic queue.
This way, multiple agents can work on the same list without the risk of crashing. There is no need to split the leads into lists assigned to one agent each. Let all your agents call the same list; we'll take care of the rest. We call it "dynamic lead distribution".
Check out our in-depth article for a detailed overview of the Queue settings.