Perl is a preferred scripting language that is that is used to build various web-oriented apps, such as CGI scripts. Among the options which distinguish it from alternative programming languages is the usage of modules - parts of Perl code which complete predefined jobs and they are widely accepted. Basically, rather than creating tailor-made code to do something or pasting tens and hundreds of lines of program code inside your script, you are able to "call" some module which already exists for this particular process and use only a couple of lines of code. This way, your script shall be executed much more quickly since it will be much smaller. Using modules will also make a script easier to change considering that you will have to go through a smaller amount of code. If you want to use Perl on your site, you should ensure that the mandatory modules are available on your server.
