There’s no proper way I can put it down by typing as it practically refers to all means of communication but here are some really good videos I’ve analysed and gone through each individually to give a much more elaborate definition and explanation.
Video on Mass media definition and more by Chris Livesey, 2011.
Video on the type of media available by myEDU learn, 2015.
Chris Livesey, 2011. Defining the Mass Media – YouTube. [ONLINE VIDEO] Available at: https://www.youtube.com/watch?v=8rEmAuRZhAk. [Accessed 14 January 2016].
myEDU learn, 2015. What is Media & Types Of Media ? – YouTube. [ONLINE VIDEO] Available at: https://www.youtube.com/watch?v=ByBz_hTJwfk. [Accessed 14 January 2016].