This article will cover how to set Alert Settings for Analytics.
By default, Alert settings is set to send students' a notification in their Activity Stream if they have not opened the course in 15 days. Instructors can set automated activity stream notifications to students on overall grade below or equal to a percentage, number of days missed due dates, or change days since last access the course.

Select the Analytics tab.
Select Alert Settings.

1. Enter a number for percentage to be below or equal to.
2. Enter a number of missed due dates above or equal to.
3. Change the days since last access above or equal to.
Or,
4. Can disable the alert settings.