How To Use The "PageBuilder Shortcode" Feature?

Hello!

Please i am wondering what’s the objective of the “PageBuilder Shortcode” option.

Please check the images below for details:
http://s10.postimg.org/cuahcfy2x/Page_Builder_Shortcode_2.png
http://s7.postimg.org/nk17ze11n/Page_Builder_Short_Code.png

Anything i try to type in there, i am getting the error message of “Element not existed!”.

It would be great if you can teach me how to use this feature. Thanks.

https://wordpress.org/plugins/wr-pagebuilder/