The Plugin Workshops are designed to help users install, configure and get the basics for our commonly used plugins.
WP Super Cache is a plugin designed to help speed up the performance of your website through caching your pages into static content. From the repository:
This plugin generates static html files from your dynamic WordPress blog. After a html file is generated your webserver will serve that file instead of processing the comparatively heavier and more expensive WordPress PHP scripts.
The static html files will be served to the vast majority of your users, but because a user’s details are displayed in the comment form after they leave a comment those requests are handled by the legacy caching engine.