Perl is a well-known programming language and among its major advantages is the fact that it supports the so-called modules - short pieces of code that include subroutines and perform numerous tasks. The beneficial side of employing modules is that you will not need to write custom code or include the entire code for a particular task every time it needs to be executed. Instead, you will be able to add just a single line in your Perl script which calls a given module, which consequently will perform the needed task. Not only will this result in shorter and enhanced scripts, but it will help you make modifications swifter and easier. If you aren't a programmer, yet you would like to begin using a Perl app that you've discovered on the Internet, for instance, it is likely that the app will need some modules to be already installed on your hosting server.