Bash is a command-line shell and scripting language used primarily in Linux and Unix operating systems. It allows users to interact with the system by typing commands, which the shell interprets and executes. Bash is widely used for automating tasks, managing files, and running programs. In addition to being a command interpreter, Bash supports scripting, enabling users to write scripts that automate repetitive tasks. These scripts can include loops, conditionals, and functions, making it a powerful tool for system administrators and developers alike. Bash is an essential component of many software development and system management workflows.