Joomla’s Task Scheduler is a new addition to the core operating system of Joomla! 4.1. The Joomla development team added it to the core to help automate repetitive tasks that maybe you’d rather not do. You can use the Task Scheduler for a wide variety of maintenance and reporting tasks, and it runs on a Plugin system that can be added to and customised.
The task scheduler runs the task detailed in a Plugin via a cron job from within Joomla’s admin. What’s a cron job? Please click here and read the full article.