Twitter’s footprint is growing fast, although English speakers in the U.S. remain the largest demographic. The trick now is to turn its global presence into advertising dollars.
By Mike Orcutt
Why: Microblogging has become a ubiquitous adjunct to major events, from earthquakes to revolutions.
Key innovation: A redesigned mobile application encourages users to discover content relevant to them while remaining within the ambit of Twitter rather than turning to third-party systems.