This screen displays the result of the execution of the next scheduled job in queue.

This enables you to test b2evolution’s internal scheduler. However this is not how the scheduler should normally run.

Note: you can also test in terminal/ssh with PHP CLI like this: php /path-to/cron/cron_exec.php.

You should normally set up a Unix cron job to call cron_exec.php every 1 to 5 minutes. See: Setting up the Scheduler.