Companies often have internal contact registers, eg in CRM in Domino / Notes. These contacts are regularly maintained with customers and suppliers. By synchronizing these with profiles in Connections, it will make it smarter to invite external members to communities.
In addition, contact information must be visible in profiles, making it easy to see his or her profession, call and send mail to the person whose needs are. This is especially useful for external contacts in a community to interact with the right resource person.