Disclaimer: features differ based on Subscription Plan
Managers of top-level have access to one more item in the user menu — Activate modules. It is used to enable additional modules or packages such as 50 units, Advanced reports, 500 SMS messages etc. If you have such an item, you can activate these modules yourself, without addressing your administrator.
In the dialog, the list of available modules/packages is displayed, as well as their cost. Select one or more modules and click OK. An alert will be displayed where you should confirm your intentions or cancel the action.