E-Alerts are messages that can be sent to you from the website. You can choose to be notified for emergencies/closings/late starts/early dismissals by text message or email. You can also subscribe to content alerts. This means that when a teacher or department sends out an alert, you are notified by email.
To get more detail see the document below.
You can also sign up to receive notification when a page is updated. This is called a Content E-Alert.
To get more detail see the document below.