Perl is a very popular scripting language that is which is used to build various web-oriented apps, which includes CGI scripts. Among the characteristics that distinguish it from other languages is the employment of modules - batches of Perl program code which do predefined tasks and they are commonly accepted. In simple terms, instead of writing tailor-made code to perform something or pasting tens and hundreds of lines of code inside your script, you can "call" a module that already exists for this specific process and use just a few lines of code. In consequence, your script will be executed a lot quicker since it is smaller. Using modules will additionally make a script simpler to edit since you'll need to search through a smaller amount of code. If you'd like to use Perl on your website, you should ensure that the mandatory modules can be found on your server.