PuTTY is a free and open-source terminal emulator primarily used for running interactive command-line sessions on other computers. Here are some key points about PuTTY:

SSH and Telnet Client: PuTTY was developed by Simon Tatham as an SSH and Telnet client. It allows secure communication over these protocols, making it useful for remote server management.

Cross-Platform: PuTTY is available for Windows, Unix, and Mac platforms. You can download it from the official website or directly from the Microsoft Store.

Serial Port Communication: Besides SSH and Telnet, PuTTY can also communicate over serial ports and legacy Internet protocols like Telnet.