I want to have this functionality in my website, but I really do not know how to use this module, I tried to follow this tutorial http://mohitaghera.drupalgardens.com/content/creating-subgroup-organic-groups
But there is a step I do not understand, you have to set the sub-group content type a group or a group content in the og settings?
Please have someone used this module? how to use it. How does it work, what is the workflow of this module.