Job queues allow long-running background tasks to be processed asynchronously without blocking the user interface. Beanstalkd is an open-source job queue that provides a simple protocol and can distribute jobs across multiple servers. At Practo, Beanstalkd is used to process tasks like sending emails, generating reports, resizing images, and performing analytics in the background. Supervisord manages the Beanstalkd worker processes to ensure tasks are processed reliably and resources are used efficiently.