Labels are a way of classifying contacts. Labels are displayed in the Search Contacts screen and you can also filter contacts by their labels

The chief advantage of using Labels for classifying or tagging contacts as opposed to, for example, Contact Types is that Labels synchronize with Google Contact Labels

Labels in Google contacts are always prefixed with a hash (#) so they can be clearly identified as Voyzu labels,

The label "#voyzu shared" is automatically applied to all Voyzu contacts