Perl is a very popular web-oriented programming language, that is used to set up CGI scripts and also many different applications. It is really handy due to the fact that you do not need to write the very same code again and again so that you can get some task executed several times, but you can apply modules. They are pre-defined subroutines or sets of activities which can be called and executed inside a script. In other words, you are able to add only a reference to a certain module inside your code as an alternative to using the entire module code over and over again. In this way, your script will be shorter, which means that it shall be executed a lot quicker, not mentioning that it'll be much simpler to maintain and / or modify. In case you wish to take advantage of a third-party ready-made Perl script rather than creating your own, it'll probably need particular modules to be pre-installed on the hosting server.