Supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems. Supervisor provides you with one place to start, stop, and monitor your processes. Processes can be controlled individually or in groups. You can configure Supervisor to provide a local or remote command line and web interface.
The supervisor is a process manager which Laravel suggests to use as a process monitor for queue workers. It will automatically start the queue worker in the background, even after the system has booted and will automatically restart the worker if the worker exits unexpectedly.