...
These are referred to as "retained items". Using retention period notification you can ensure that content on your website remains current and up to date. When the content of a page, page section, article, or custom media item remains unchanged for the specified number of days, an e-mail notification will be sent to you that lists the item(s) and the number of days they have remained unchanged. E-mail notifications detailing retained items will be sent to you once a week. The time and day of the week that the notification is sent is based on the time this setting is configured. For example, if you change this setting at 10:00 a.m. on a Tuesday, you will, receive notifications every Tuesday at 10:00 a.m.
For information on subscribing to retention period notifications, see the XperienCentral online help for (Notification Settings in My Settings).
Retention Period E-mail Content
...