VNC Viewer is a software application that allows users to remotely access and control another computer over a network. It uses the Virtual Network Computing (VNC) protocol, enabling users to see the desktop of the remote machine and interact with it as if they were sitting in front of it. This is particularly useful for troubleshooting, remote work, and accessing files or applications from different locations. The application is available for various operating systems, including Windows, macOS, and Linux. Users can connect to a remote computer by entering its IP address and a password, ensuring secure access. VNC Viewer is widely used in IT support, education, and personal use for its simplicity and effectiveness.