3 Key Takeaways on Mobile.

• Be sure your website is mobile-optimized
• Create content that is easy to consume and respond to via mobile devices (shorter responses are better)
• If your audience is business-oriented or located in the Asia/Pacific region, make sure to develop a mobile strategy

The article where these are listed as key takeaways has some interesting statistics about social media and user behavior. You can read the full article here:
5 Social Media Tips for Finding and Engaging Your Target Audience