CardScan is a service that allows users to scan business cards into a digital format, store and organize contacts, and synchronize across devices. It offers three packages - a personal scanner for $159.99, an executive scanner for $259.99, and a team scanner starting at $399.99 for one scanner and software for two users. The service is presented as a useful tool for management consultants to organize contacts, minimize physical cards taking up space, and easily update and share contacts with teammates.