As an administrator, you can add new departments and sub-departments to which your users belong and assign them the respective department. This would come in handy whenever you want to set up policies around departments. You can assign Head of the Department as well.

TO ADD A NEW DEPARTMENT
Go to Organisation settings on the Settings page
Click on the "Departments" tab
Click on "Add Department"

Enter the Department Name in the form that pops up
Enter the email ID of the "Head of the Department" if applicable

Enter any other additional details as required and click on "Add Department"
Once these steps have been completed, a new department will be created in Fyle which you can assign to employees.
TO ADD A SUB-DEPARTMENT
In case you wish to add a sub-department to an existing department, you can also do so by following these steps
Click on "Sub Department" against an existing department that has already been created

Enter the Sub-Department details in the form that pops up

Enter any other additional details as required and click on "Add Sub-Department"
Once these steps have been completed, a new sub-department will be created within the required department.