Cortana, as it says, does try to make life of Windows Phone users a bit easier. When you turn on ‘Quiet Hours’ in Cortana’s notebook on Windows Phone, she takes all the responsibility to see that you are not disturbed by any calls or messages until you turn off those ‘Quiet Hours’.
But there may be also some people, to whom you give the flexibility to call or text you even when you wanted some ‘Quiet Hours’. Adding those people to ‘inner circle’ makes Cortana understand that, it is OK to allow calls or texts from these people even during ‘Quiet Hours’.
This post will make it clear to you about what actually inner circle is and how to use it with Cortana on a Windows Phone.
How to add people to ‘inner circle’ on Windows Phone:
1. Go to Cortana by pressing search button 
to the bottom right of the phone.
to the bottom right of the phone.
2. Tap on Cortana’s Notebook (the three bars) 
and go to ‘Inner Circle‘.
and go to ‘Inner Circle‘.
