WP Super Cache is a popular and featured cache plugin, officially developed by WordPress core programmers and Automattic team. The plugin can be used everywhere such as on shared hosting plans, VPS and dedicated servers.
It powers WordPress with a very fast caching engine that produces static HTML files to better your loading time and reduce resource usage.
When HTML files are generated, your webserver starts to serve those files instead of processing PHP queries. Hence, less resources are used and website loads faster than before.
These static files are served to majority of your visitors, but when a user’s details are shown in the comment form, as they leave a comment then in that case requests are handled by the legacy caching engine.