The word commune stands for a large range of group living. A household of people who share the same attitudes and characteristics. Also these people shall find eachother inspiring, energizing, entertaining and the such. There are inernational communes such as eco-villages, group marriages, survivalist and radical religions and many more. Communal living is a chance for people to have deep, intimate companionship with more than one person.
Communes are kind of like a chosen family.
Instead of living with the bilogical family you can kind of pick the people you want to live with and share with. There are many advantages to communal living. Expenses are shared. So these communes live more cheaply than a single person. People living in communes are freeer to travel.