To start, click on your name at the top right corner of IMS. From here, select "My Profile."
This should immediately take you to Notification Preferences for your profile, as shown below:
You may turn on all of them, or select specific notifications. You may also adjust the frequency in which you will receive these notifications, once they are toggled on. You have a few choices such as Weekly, Daily, Monthly, as well as the ability to choose the day you receive the notification. Some options may also provide the option of receiving Realtime notifications.
Lastly, make sure to select the "Save" button at the bottom right of the screen, to ensure that your selected notification preferences will be updated, and saved.