The order of the groups determines how they are displayed to your colleagues. The most important groups should be as high up in the list as possible so that they are quickly accessible.
How to change the order of groups:
3. Select the group you want to move and move it via Drag’n’Drop. Hold down the left mouse button over the group and move it while holding down the left mouse button.
4. Release the left mouse button when you have moved the group to the desired position.
The new order of the groups will then be applied to all users in the company.