Perl is a well-known scripting language that is that is used to build various web-oriented applications, such as CGI scripts. One of the features which differentiate it from many other programming languages is the employment of modules - batches of Perl program code which perform predefined tasks and they're widely accepted. Basically, as an alternative to creating tailor-made code to do something or pasting tens and hundreds of lines of code in the script, you're able to "call" some module which already exists for this specific job and use just a couple of lines of code. Thus, your script shall be executed faster because it is smaller. Using modules will, in addition make your script simpler to modify considering that you'll need to go through a smaller amount of code. If you would like to use Perl on your website, you need to make sure that the needed modules are present on your server.