Perl is a well-known programming language and one of its major pros is that it works with the so-called modules - short bits of code that include subroutines and perform multiple tasks. The practical side of using modules is that you will not need to create custom-made program code or include the whole code for a specific action whenever it needs to be performed. Instead, you are able to add just one line in your Perl script that calls a given module, which in turn will execute the necessary action. Not only will this provide you with shorter and enhanced scripts, but it will also allow you to make adjustments faster and easier. In case you aren't a programmer, yet you'd like to start using a Perl app that you've found on the worldwide web, for example, it is likely that the application will need some modules to be already installed on the hosting server.