Perl is a widespread language, which is used to create various web apps and CGI scripts. Many programmers consider it to be among the most efficient languages available because it supports the use of modules - tiny parts of code with pre-defined subroutines which are used to perform a specific task. The modules can help you save time and effort and they will contribute to the quick speed of your sites because you'll be able to add only 1 line of program code to call a given module rather than using all of the program code for the task in your script. Perl is a multi-functional language often used for scripts, but it has been employed to generate numerous popular pieces of web software as well, for example cPanel, BugZilla and Movable Type. It's also employed on high-traffic websites such as IMDB, Craigslist, Ticketmaster and many others.