Perl is a very popular web-oriented computer programming language, that is designed to set up CGI scripts along with various applications. It is very handy considering that you do not have to submit the same program code time and time again so that you can have some task executed a couple of times, but you're able to employ modules. They're pre-defined subroutines or sets of functions that can be called and executed within a script. In other words, you'll be able to add just a reference to a specific module inside your program code as an alternative to using the whole module code time and time again. This way, your script will be shorter, which means that it'll be executed faster, not mentioning that it'll be a lot easier to maintain or modify. When you wish to employ some third-party ready-made Perl script rather than writing your own, it'll probably need specific modules to be present on the hosting server.