Millenials are a group that deserves their own strategy and social media engagement plan, mandating different interests and reasons for engaging with a company on social media. Millenials, and the generations after are used to technology and the role it plays in their everyday life. They are comfortable with professional or semi-professional relationships with organizations, but also want a reciprocal benefit to the engagement (like coupons, codes, or exclusive access of some sort). This article offered a great deal of insight into how organizations can develop content plans targeted to millenials: http://thejsms.org/index.php/TSMRI/article/view/15/18
There is a video linked as well which provides relevant content and reframes the conversation paradigm.