Adding a group shortcut in Facebook app is a simple process. First, open the Facebook app and sign in with your account. Then, click on the three lines in the top left corner of the main screen and select “Add New Group”. Type in a name for your new group and click on the “Add” button. Once you have added your new group, you will see a list of groups that are available to you. To add a group shortcut to one of these groups, simply select it from the list and click on the “Add Shortcut” button.