Zsh, or Z Shell, is a powerful command-line interpreter for Unix-like operating systems. It is an extended version of the Bourne Shell (sh) and incorporates features from other shells like bash and ksh. Zsh is known for its user-friendly features, such as advanced tab completion, improved globbing, and customizable prompts. One of the standout features of Zsh is its ability to support plugins and themes through frameworks like Oh My Zsh. This allows users to enhance their command-line experience with additional functionality and visual appeal. Zsh is popular among developers and system administrators for its flexibility and efficiency.