Cron automated tasks
The term “Cron” refers to automated tasks that your site performs every N hours. For example, it checks whether updates are available for the Drupal core, as well as for any contributed modules and themes you've added.
By default, Cron runs every three hours, but this can be changed to every hour, every six hours (or more). You can run cron manually at any time from the top of the “Reports” > “Status Report” page. Additional modules are available for extended cron functionality.
Overview of Cron Automated Tasks
A detailed overview of “Cron” automated tasks in Drupal 8.
Automated Cron
Drupal 8 provides the Automated Cron module.
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