Your Agent Homepage is the dashboard page that they will be greeted with when they log in. It will be made up of Queues, either some or all of the default ones. Some custom queues or a mixture of the two. You can create multiple homepages and then assign them to different users or teams depending on what you want them to see.
Choosing the queues to add to your Agent Homepage or showing all the available Queues already found within your default Agent Homepage looks like this. You can also sort the order of the queues by dragging them up and down using the handles on the left.