This may be the first research study of Twitter – the Microblogging phenomenon… Why We Twitter: Understanding Microblogging Usage and Communities is part of the Proceedings of the Joint 9th WEBKDD and 1st SNA-KDD Workshop 2007 and available for download. Conclusions? The Popularity of Micro-blogging (i.e.Twitter) is due to the combined benefits of –Light-weight blogging –and the ability to share i