Question about Comments

In CB activity, there is the tab 'comments'.
I can't find any details or controls about this in CB.
So, my question; What does CB use to acquire this data?
Is this internal through CB? In which case I need to access the controls for the parameters.
Does CB use a plugin for a comments app? If so, which one? Kommento? CC Comments? Etc.

CB Activity comments are entirely internal. It has its own database table for storage. CB Activity includes a Joomla content plugin that can add commenting to Joomla articles or anywhere on your site using the content replacer substitution (described in the description of CB Activity Joomla content plugin). You can specify comment create permissions under the Create tab of the Comments tab. Display access is entirely dependent on where and what is rendering the comment stream.