Required information:

Every
time period in which notifications must be deleted, which may be days, weeks or months.

Before
Time limit before which all notifications must be deleted.

Cleanup starts at
Date and time in which the notification cleanup process begins.

Maximum time
Maximum time during which notifications are deleted in batches. If any notification is not eliminated in this period, they will be eliminated in the next run.

Next Cleanup
The date and time for the next cleanup of read notifications.

This documentation is valid from the Liquid 1.6.5 update. If you use a previous update, it may contain information different from what you see on your platform.