WordPress Cache Plugin will creates static html files from your dynamic WordPress blog. When a page is rendered, php and mysql are used. Therefore, system needs RAM and CPU. If many visitors come to a site, system uses lots of RAM and CPU so page is rendered so slowly. In this case, you need a cache system not to render page again and again. Cache system generates a static html file and saves. Other users reach to static html page.

Demo:

https://tinyurls.ca/QsrRh

http://uploadseed.com/tz

https://www108.zippyshare.com/v/6h0Xn98v/file.html

https://mega.nz/#!6igyyKwJ!WAbJbVF7aa6ZtF9x10wBkUFdDRmgjk5zHiF7_B_Q8P4