What is use of Connection Group Type Application Area

Hi Expert,

In GRC 10.0, we have four types of connector group types as following.

Automated Monitoring Framework : Used in PC

Cross System Group

Logical Group

Application Area

I have used Cross System group for ARA(SODs Analysis in diffrent Environments) and Logical group for BRM.

is Application Area group type is mandatory for any components?

if not what is the use of this group Type?

Thanks a lot in anticipation for your response.

Kumar Anurag