Perl modules are collections of functions that allow you to perform tasks in Perl. You can relate the way it works to the way class in Object-Oriented Programming works.
All modules are directly installed  from the CPAN (Comprehensive Perl Archive Network) repository.

On the Interface, you can

• view the path to your  Perl modules installations.
• view the snippet you need to add to your script before your Perl Script will find the modules in your path. #!/usr/bin/perlml  is an example. 
• search for a Perl Module or Show a list of Available Modules

• Alternatively, if you already know the name of the module that you want to install, you can type the module name and then click Install Now.

• view Installed Perl Modules and also System Installed Modules.