What is Queue connections in Laravel, and what role does it play in a real application?

What is Queue connections in Laravel, and what role does it play in a real application? In Laravel, queue connections should be understood as part of a larger application architecture rather than as an isolated API call. A queue connection determines how jobs are stored and retrieved by workers. A strong understanding includes its purpose, the layer where it belongs, the data or request flow it affects, and the situations where another mechanism may be more appropriate. Practical context: Laravel queues move slow tasks into background workers so web requests can respond without waiting for lengthy operations. The specific focus here is queue connections: A queue connection determines how jobs are stored and retrieved by workers. This question is designed to test not only terminology, but also how the concept fits into Laravel's request, application, database, security, or deployment workflow.