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 through themes and plugins. It is a command-line interpreter for Unix-like operating systems that enhances user productivity and scripting capabilities. Zsh is widely adopted as a default shell on macOS and by developers seeking a more powerful alternative to Bash.
Developers should learn Zsh when they want a highly customizable and feature-rich shell environment that boosts command-line efficiency, especially for daily development tasks, system administration, and automation. It is particularly useful for those working on macOS (where it is the default since Catalina), managing complex workflows with plugins like Oh My Zsh, or seeking better tab completion and scripting features than Bash offers.