Group:

Groups are generally used to manage specific devices that have some kind of relation to each other. The ‘Group' function enables you to arrange the devices any way you like, for example all the main lights could be grouped together and called 'Main lights', or you could group entermainment devices togther such as TV's, Radio's, DVD, etc. so that they can be accessed and be viewed at the same time.

A 'Group' can be easily be made by clicking on 'Create New...' after click on the 'Group' tab.