You build-up your organisation inside Ziik by positioning units at the right place in your organisation. To create a unit you first of all have to be in the "Contacts" module. Once there simply click the "create unit" unit button in top right-hand corner.
Next, you will be asked to name the new unit and select its parent unit.
Select the parent unit to the new unit that you are in process of creating.
You can now see how the unit is positioned in your organizational hierarchy by clicking on the hiearchy icon.
Now that you understand how to set up your organisation it is time for you to understand how the hierarchy actually works. To get familiar with this have a look at the following article Hierarchy Article.