A new study released by destination marketing firm Development Counsellors International examined how those bureaus are using Twitter.

The study analyzed nearly 3,000 tweets from the largest CVBs in the country over a 30-day period in May. The results showed that Baltimore, Fort Lauderdale, New Orleans, San Francisco and Tampa Bay are the top U.S. destinations to market their cities via Twitter.

The study also documents what, exactly, these travel marketers are tweeting about, though not necessarily how effective those tweets are at strengthening business.

The breakdown:
- Announcements about upcoming local events and news -- 54 percent
- Social tweets -- 28 percent
- Replies to followers -- 20 percent
- Deals (both travel and non-travel related) -- 17 percent
- Re-tweets from community partners -- 13 percent

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