While mobile marketing is a rather new method, it's massive results haven't been deterred by that fact. SMS text messaging is one of the quickest growth points in mobile marketing. For example, nearly 800 billion messages were sent during the month of June 2017. As opposed to email, over 90% of SMS messages are opened. SMS text messaging has developed into a very efficient customer retention tool. Mobile marketing generated nearly $44.8 billion in 2016 in advertising revenue and is expected to exceed 80.6 billion by 2020.