The Comments Box easily enables your users to comment on your site's content — whether it's for a web page, article, photo, or other piece of content.
Idea with this block is to save time on sites where you have lets say several article pages and you want every article to have its own comment block.
When added block will automaticly generate Unique ID for the block, even if you are adding the block by using page type defaults.
You are also able to use several comment blocks on a single page, and they will be totally independent.
Autogenereted Unique ID is displayed once you click on Edit after the block has been added.