There's not much to be gained from going over the tired debates about Twitter - it exists, we know what it is, what it does and how, like any other good web application, it's constantly developing.
And it's powerful because it's about trust and proximity - the two words that drive the web.
Ideas about how online learning works best have changed greatly over the past few years. Not long ago, online learning meant chunky, possibly well-designed (but often not), compliance-based, interactive, walk-through, end-to-end 'modules'.
You walked through what your teachers wanted, not what you - the learner - needed. All that was important was that learners had been told - not that they had actually learnt anything.
Online scenarios, lectures and tests are still valuable - but limited. You'll find some still here on this site. We use them to tell learners to 'take notice' or to ask you to test what you know.
They're short, to the point and a very minor part of good online learning.
Better is a recommendation or advice from a trusted practitioner: get this, watch this, you might find this useful. Something close to your needs, something proximate.
Trust and proximity.
It's how we all learned. On a story, needing to solve the next problem or make the next story even better. With a producer, camera, editor or correspondent, we admired, respected and trusted.
That's why the bulk of what you'll find on the CoJo site is exactly this - advice and tips from respected and trusted colleagues, presented in a way through which the learner can find his or her own route.
And that's why Twitter does the job.
BBCCojo on Twitter daily scans blogs, website and other respected Tweeters and offers quick links - recommendations - to its followers. It - we - point to stuff that looks to us like something BBC journalists might be able to learn from.
Not every journalist will learn from every link, but knowing what's out there and what might be relevant - proximate - is a first step to learning. If it feels and reads or sounds like trusted advice, the chances of it making a difference are high.
That's how I learnt. That's how we all learn best - trust and proximity.
That's why we Tweet.
