To others it's a social networking tool for contacts and leads, a project management tool or a research tool for developing stories.
In other words it is what you make it - and the only way to figure it out is to start using it.
The following is a guide to mastering Twitter as a journalist, and some of the things that can be done with it. Twitter for newsgathering Contacts are central to a journalist's work. Twitter makes it easier to find them. It's where blogging meets social networking.
Look at who they're following - entering someone's username on Gridjit is a good way of seeing someone's contacts and what they're saying, or you can use Quotably to follow their conversations.
Try Twits Like Me to find people who twitter about the same things as you and Twubble (based on your friends) and Tweetscan for key words searches (e.g. "NHS").
She says it's become a support network: "It moves into the crowdsourcing thing - if you want to do something you can put out questions and get answers."
Managing your Twitter feeds Once you've set up enough contacts, it's useful to create some filters to help manage the incoming information.
Desktop applications like Twhirl and Snitter will give you an audio alert; the latter also allows you to filter your tweets (for keywords for instance).
You can also set up pages to organise tweets from 'crowds' of twitterers (for example, friends, colleagues, contacts) using Crowdstatus.com.
You can - and perhaps should - set up Twitter to send updates to your mobile phone (click on 'add device' or look in settings). It's free, and is particularly useful for following what's happening while you're on the move. But pick your sources carefully - Twitter will only send 250 updates per week, and it's easy to hit that.
The first thing you should do once you've set up Twitter to send text alerts is to text Twitter the word "track" followed by your username. This means Twitter will text you whenever anyone mentions your username on Twitter - very useful for picking up messages aimed at you.
You can use the same trick to track mentions of keywords in your area, such as a key employer or your own organisation. More tips on mobile commands can be found here.
Twitter for news publishing, distribution and creation If you want an idea of what Twitter can do for news publishing check out BreakingNewsOn. Headline alerts of breaking news that people can receive on their mobiles are the most obvious application, and used by dozens of organisations.
Many newspapers have separate Twitter accounts for different sections, such as business, traffic and sports. Sky even had one for news about Madeleine McCann.
Twitterfeed will save you typing updates by pushing RSS feeds from your newspaper to a Twitter account, but this means you have to write the article first and risk missing the scoop.
If you though that the service was limited to texting - you'd be wrong. Tweetr is another Twitter reader, its USP is that it allows you to send files up to 10MB through Twitter.
TwitPic allows you to send images from your phone and not only posts links straight to your Twitter account but allows people to post comments that are then posted on their own Twitter page (with a link to the photo). Twiddeo allows you to do the same with video.
But Twitter becomes really impressive when you tap into its social, conversational nature - or combine the RSS feeds from a number of twitterers.
Shawn Smith used it to create the Michigan Twitter Network, which "follows more than 1,300 Michigan twitterers. We’ve gained about 200+ followers and use [another] account to send breaking news alerts and also poll users".
What I've outlined here is just the start,there are plenty of other experiments being done with the service and plenty of similar services out there too - although none as comprehensively played with.
Reporters need to remember that Twitter is simply a platform - the really interesting stuff starts when you try something completely new...