Once you click on this you will be getting all Facebook posts related your account.

First, you need to select a post which you wish to send private replies&nbsp;

Once youclick on this all the acitions for this post will be visible. you can select the option on your requirement.

Once you click on the "send" reply will send as a private message and this will be updated in the Facebook post as well as "Replied Privately"

This option enables you to send private replies to Facebook comments. While sending private replies other Facebook users cannot view your replies. 

How To Send Private Reply For Facebook Comments

Everything about Unibox view, actions, best practises and common questions. 