Queues and Dashboards are very similar and they can display tickets in order to keep track of assignments and tickets you're working on.
Queues
Queues are a new feature within Orange Tracker to quickly view tickets. They provide high-level information on a ticket, showing fields like summary, status, and others. Queues auto-refresh in the browser and are very easy to share within the project. Queues are designed for a single project.
For information to create a new queue: https://support.atlassian.com/jira-service-management-cloud/docs/create-a-new-queue/
Dashboards
Dashboards can also quickly view tickets. Dashboards are more complex as they require gadgets to display information, and can show tickets in multiple forms. Dashboards can also display tickets for multiple projects.
To create a New Dashboard: https://support.atlassian.com/jira-service-management-cloud/docs/manage-dashboards-and-gadgets/