An SSH client is a software application that allows users to securely connect to a remote computer or server over a network. It uses the Secure Shell (SSH) protocol to encrypt the data transmitted between the client and the server, ensuring that sensitive information remains protected from eavesdropping. Typically, an SSH client provides a command-line interface or a graphical user interface for users to execute commands, transfer files, and manage remote systems. Popular examples of SSH clients include PuTTY for Windows and OpenSSH for various operating systems, including Linux and macOS.