If you have no clue what a script is, then you will definitely need a quick-installation utility such as Simple Scripts or Fantastico. These utilities let you quickly install over 50 scripts without any formal training or technical knowledge.
A script is basically a program or application that will enhance your website in some way. For example, content management systems such as Wordpress can be installed using simple installation utilities. Without these one-click installation utilities, it would be nearly impossible for the average person to install all of the scripts needed to operate the site optimally.
Aside from content management system scripts, these utilities help you install traffic analysis scripts, entire forums, and various blogging platforms that give you complete administrative control over your sites.