Perl is a very popular web-oriented computer programming language, that's employed to create CGI scripts and also various applications. It is really practical since you do not need to create the same program code time and time again in order to have some process executed several times, instead you're able to use modules. They are pre-defined subroutines or sets of tasks that can be called and executed in a script. In other words, you are able to add just a reference to a specific module in your code as an alternative to using the entire module code again and again. In this way, your script will be shorter, which means that it will be executed a lot quicker, not mentioning that it'll be a lot easier to maintain and / or modify. In case you wish to use a third-party ready-made Perl script rather than writing your own, it will most likely need certain modules to be pre-installed on the hosting server.