Social micro-blogging website which allows users to post small status updates of up-to 140 characters, Twitter has changed its update prompting questions from "What are you doing?" to "What's happening?". The new tag line, which is much quick and crisp, was recently confirmed by Twitter co-founder Biz Stone.

The reason for this small change to the popular website has been explained by Stone in a post on the site's official blog. He writes that the site was "originally conceived as a mobile status update service". Now Twitter is trying to change the perception that it is used only by people casually who want to "update what they are having for lunch", especially since the website has now become an important tool for social media marketing and is used by businesses all over the world.

"People, organizations, and businesses quickly began leveraging the open nature of the network to share anything they wanted, completely ignoring the original question, seemingly on a quest to both ask and answer a different, and more immediate question, "What's happening?". A simple text input field limited to 140 characters of text was all it took for creativity and ingenuity to thrive", writes Stone.

While the change is very small and Stone is not expecting people to change the way they use Twitter because of it, it has been stamped as a huge step for the company.