-Announcing New Products
-Interaction with Customers.
-Advice and Useful Information.
-Effectively Handling Customer Issues.
Social media is becoming more powerful but is someone limited. Most mobile media refers back to a webpage hosted somewhere else. However, it does create a channel to interact with customers and provide announcements. The key here is "engagement". Make sure you are actively engaged with subscribers and visitors.
Tsimonis, G. & Dimitriadis, S. (2014). Brand strategies in social media. Marketing Intelligence & Planning, 32 (3).