Shell helps in doing work that is repetitive in nature. For example: When executing a bunch of commands, shells can take all these commands directly from a stored file and execute them, instead of writing them every time.
Used to run routine backups/tasks by admins.
They are easier to write and debug than other programming languages like PERL, and PYTHON.
We can transfer the shell script to other UNIX and similar operating systems and execute it.
Shell scripts are also used to monitor systems regularly.
