Perl is a preferred scripting language which is employed to make different web-oriented applications, such as CGI scripts. One of the characteristics that distinguish it from alternative programming languages is the employment of modules - batches of Perl code that execute predefined tasks and they're universally accepted. Basically, instead of creating tailor-made code to perform something or pasting tens and hundreds of lines of program code in your script, you can "call" a module that already exists for this specific process and use just a few lines of code. Due to this fact, your script shall be executed more quickly because it is much smaller. Employing modules will also make the script easier to change because you will have to browse through much less program code. If you intend to use Perl on your website, you need to ensure that the required modules are present on your server.