Use lists to keep your contact base organized. Go to Contacts and click on the “Lists” tab below – where you can create as many lists as you need. After creating a list – choose contacts which you want to move in it with checkboxes, press “Move to”, choose the appropriate list, and press “+” sign from the left of the list.
Note: when you checkpoint the contacts – the hidden menu appears:
There you can do different actions with contacts, including “move to” the certain lists.
One contact can be stored in one list.