Notifications can be very useful for receiving the following types of alerts:
When the TIC score of a collection increases
When the TIC score of an element increases
When there is a new Threat association
When there is a new Vulnerability association
And, when there is a new risk (a new Threat or Vulnerability)
New notifications will appear as a badge just below the bell icon on the top navigation bar. You can also choose to receive them via email.