LiveLAN is a videoconferencing software that allows users to conduct video calls over a local area network. It uses standard multimedia hardware and supports features like audio/video calls, file sharing, application sharing, and remote control. The document provides overviews and instructions for installing and using LiveLAN's various features through an easy-to-use interface. It includes details on starting LiveLAN, placing and receiving calls, controlling audio/video settings, using the phonebook and preferences, and troubleshooting issues.