Perl is a well-liked web-oriented computer programming language, that's designed to create CGI scripts and also a variety of applications. It is very convenient for the reason that you don't have to submit the very same program code time and again so as to have some action executed a couple of times, instead you are able to work with modules. They are pre-defined subroutines or sets of functions that can be called and executed in a script. In other words, you're able to include only a reference to a particular module in your program code instead of using the whole module code time and time again. In this way, your script will be shorter, which means that it'll be executed quicker, not mentioning that it will be much easier to maintain and / or modify. In case you would like to employ some third-party ready-made Perl script rather than writing your own, it will most likely need specific modules to be pre-installed on the web hosting server.