A Bash script is a simple text file that contains a series of commands for the Bash shell, which is a command-line interface used in many operating systems, especially those based on Linux. These scripts allow users to automate repetitive tasks, making it easier to manage system operations without having to type each command manually. By writing a Bash script, you can execute multiple commands in sequence, handle files, and even create loops and conditions. This makes it a powerful tool for both beginners and experienced users who want to streamline their workflows and improve efficiency in their daily tasks.