Since its penetration in peopleís lives, Web 2.0 has become a rapid success in terms of diffusion. Social networking, which is among what Web 2.0 offers, is one of the top activities of millions of people on the Internet. Twitter is one of the most used microblogging platforms. It was first founded in 2006; however, was introduced in Turkey in 2011 after the addition of Turkish language support. It became one of the most used platforms in Turkey in a relatively short time. The aim of this study is to explain how Twitter has diffused and become a success in Turkey using Rogersís diffusion theory (2010). The diffusion of Twitter in Turkey is carefully analyzed using the four main elements of Rogersís theory which are the innovation, communication channels, time, and social system.