The document discusses setting up a private social network using Yammer Enterprise. Some key points: - Yammer Enterprise allows users to have full ownership and control over their digital content in a private network, unlike public social networks. - To set up a private social network, a user needs a domain-based email account and a Yammer Enterprise subscription, which costs $23 per month. - The user can then create a private external network on Yammer, invite friends, and interact privately while having full administration and security over the content and users.