You can synchronize contacts between more devices at the same time. Synchronization of contacts is the most convenient way of contact management.
Example: You set up synchronization of contacts between your Raven, Essence, tablet and PC. When you update contacts in one device then contacts in other devices are updated automatically.
You can also synchronize contacts among employees in your company. When administrator adds a contact of new colleague this is automatically imported into the phonebook of all employees.