Notification (noun)

1. The act of informing or being informed of something.
2. A message or other information that informs someone of something, especially of an event or development.

Origin:

Late middle english: from late latin notificatio(n-), from the verb notificare (see notify).

Examples:

1. The company sent out a notification about the upcoming meeting.
2. I received a notification that my order has been shipped.
3. The application sends a notification when new messages arrive.
4. He received a notification from the government about the changes in the law.
5. The school sent out a notification about the early dismissal.