Team Viewer is a software that allows sharing screens and transferring files between computers remotely. To use Team Viewer, both computers must have the software installed. An internet connection is required, as remote control will not work without it. The document provides step-by-step instructions on how to use Team Viewer to remotely access and transfer files between computers. It explains how to start a remote session by entering your ID and password, access the other computer's desktop, and transfer files between the two systems.