It’s been around for only seven years and can now boast more than half a million users. It’s the antidote to long, waffling emails with a limit of 140 characters per post. And it’s pioneered a new way of conversation between celebrities and their fans; businesses and their customers; and even royalty and their subjects. Yes, it’s Twitter. A micro blogging service that shows no sign of declining popularity.

Could you be using it in your business? Almost certainly. Whether it’s communicating with your clients or keeping in touch with developments in your industry, Twitter can be an invaluable communications tool. Not sure where to start? See our guide for advice on how to set up a Twitter account and make the most of this social networking tool.