Technological convergence refers to the merging of existing technologies into new forms that combine different types of media and applications. It involves the union of technologies and the digitization of various types of data like text, voice, video and graphics. Some key reasons for convergence include the rapid advancement of the internet, availability of high-bandwidth technologies, and the need for devices that can handle multiple media formats and functions. Convergence impacts computer technology, content that can be interacted with on various screens, and communication systems. It allows for integration of services like SMS, voice and multimedia into messaging and brings different media channels together through digitization.