The Billboard Twitter Real-Time charts were four interactive Billboard music magazine charts debuted on May 27, 2014. The charts ranked trending songs from popular and emerging artists based on how often they are mentioned in messages called "tweets" sent by social networking site Twitter in the United States. The charts "Trending 140", "Emerging Artists", "Weekly Top Tracks" and "Weekly Emerging Artists" were reported to define how fans interacted with, and influenced, popular content by ranking the most popular songs being shared on Twitter in the U.S. The first two charts updated on a "real-time" minute-by-minute basis, with the last two charts providing weekly summaries.