Perl is a widely used programming language and one of its main advantages is that it supports the so-called modules - short pieces of program code that contain subroutines and execute multiple tasks. The convenient side of using modules is the fact that you will not need to write custom program code or add the entire code for a particular process whenever it should be executed. Instead, you'll be able to add just one line in your Perl script which calls a particular module, that consequently will execute the needed action. Not only will this result in shorter and enhanced scripts, but it'll also allow you to make adjustments swifter and easier. If you are not a programmer, still you'd like to employ a Perl app which you've found online, for instance, it's likely that the application will need specific modules to be already set up on your web hosting server.