The asynchronous task scheduler allows some operations to run asynchronously (like cron jobs). For example, this allows b2evolution to automatically update its antispam blacklist once a day, or send reminders about unread messages every so often, etc.

Scheduled jobs are processes that are queued in order to be executed asynchronously (at a later time, or at regular intervals) instead of being executed immediately. This has two advantages:

1. It prevents you from waiting for longer operations to finish while you use the application (e-g: pinging remote sites after posting, sending email notifications to many users, etc.)
2. It allows for automatic execution of maintenance tasks (e-g: updating the Antispam Blacklist every day, cleaning up the database at regular intervals, etc.)

For this to work, you need to properly set up the Scheduler first.