With the San Francisco-based microblogging site Twitter attempting to extend its reach to businesses, a requisite change of perception, that the site is basically used for updating personal status only, has led the company to change its familiar tagline from "What are you doing?" to "What's happening?"

Announcing the subtle change on Thursday, Twitter co-founder Biz Stone said that the site has "long outgrown the concept of personal status updates."

Noting that the service was "originally conceived as a mobile status update service," Stone added that though the company does not expect the change in tagline to affect the use of the site by users, it marks a notable step ahead for the company.

Stone said that with Twitter's growing popularity, the significance of "What are you doing?" had waned. Stone elaborated: "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, more immediate question, 'What's happening?'"

Furthermore, the 140-characters' text site, Twitter, which has grown momentously from a niche community to a major social network, is also asking, "Where are you?" With the official release of its Geotagging API, the site is enabling developers to come up with Twitter applications that tag, alongside the 'tweets,' the location from where they have been sent.