Perl is a well-liked web-oriented computer programming language, which is employed to create CGI scripts and also many different applications. It is really useful for the reason that you don't have to produce the same code time and time again so that you can get some task executed more than once, instead you can use modules. These are pre-defined subroutines or groups of functions which can be called and executed in a script. That is to say, you can include just a reference to a given module in your program code as an alternative to using the entire module code time and time again. This way, your script will be shorter, therefore it shall be executed a lot faster, not mentioning that it'll be easier to maintain and modify. If you want to take advantage of a third-party ready-made Perl script instead of writing your own, it will most likely need particular modules to be pre-installed on the website hosting server.