The "Slug" is the end url of the group. For instance, if you start a new group for coffee lovers you can give it the slug "coffee_lovers". after you will create the group, its address will apper as follow: "http://www.ekkli.com/group/coffee_lovers/"

All the acitivities of the group will be under this url.

You can also add a short description for the group.

After you finish entering the details, press "create" to create the group. The group will appear in the home screen: