Hello Kelly,
Thank you for posting your question. Notifications can be configured to make users aware of changes.
https://help.rallydev.com/set-your-notifications
Notifications keep you informed of changes to work items that affect work in which you are actively engaged. Related work items are often changed and updated during the course of development, and it is important these changes are known to all involved team members. You can receive notifications from CA Agile Central's My Notifications page, through email, or in any configured RSS reader.
To make sure notifications are received via email the email notifications box must be checked in the the profile settings.
Please let us know if you have other questions.
Thank you,
Christian Maldoff