Massive Open Online Courses (MOOCs) designed upon the idea of free, open and world-wide knowledge sharing, have been an out-spread response to global educational needs of distant learners since 2008. In this connection, MOOCs have a pivotal importance for not only providing educational equality for millions, but being a unique opportunity for supporting students at a distance as well. Also within the ascent of mobile learning in education field in the last decade, MOOCs have got a new dimension, that is learning any time at any place. Keeping these views in mind, the focal aim of this paper is to provide a general overview on the emergence of MOOCs, the different types of MOOCs, the dimensions of these MOOC types, their typologies as well as to provide a specific examination on e/m learning integration in the context of formal, non-formal and informal learning.