Explain how Twitter makes money through advertising. Find examples of companies using Twitter as a promotional tool. (AACSB: Written and Oral Communication; Reflective Thinking)

How does social media advertising spending compare to traditional mass-media advertising spending? How likely is it that Twitter can become a media entity rather than a media platform, and what are the implications for advertisers? (AACSB: Written and Oral Communication; Reflective Thinking)