The clickable links are for:
Natterbox Users - manage users of the system. The number of users that have been created are displayed here.
Phone Numbers - manage phone numbers available to the system. The number of phone numbers that have been provisioned are displayed here.
Devices - manage devices within the system. The number of devices that have been provisioned are displayed here.
Groups - manage groups within the system. The number of groups that have been configured are displayed here.
Routing Policies - manage routing policies within the system. The number of routing policies that have been configured are displayed here.
Next to each is a link to go straight to the page to Add New for each of those record types. There is also a clickable help link to the article describing each of those pages.