Zsh
Zsh (Z Shell) is an extended Bourne shell with many improvements, including features for interactive use such as advanced tab completion, spelling correction, and extensive customization options. It is a command-line interpreter for Unix-like operating systems that is highly compatible with Bash but offers additional functionality and a more user-friendly experience. Zsh is widely used as a login shell and for scripting, particularly favored by developers for its powerful command-line interface enhancements.
Developers should learn Zsh when they want a more feature-rich and customizable shell environment than Bash, especially for interactive command-line work on Unix-like systems (e.g., macOS, Linux). It is ideal for improving productivity through advanced autocompletion, theming with frameworks like Oh My Zsh, and scripting with extended features like globbing and array handling. Use cases include daily terminal usage, automation scripts, and environments where enhanced user interaction and customization are priorities.