MOOCs create enormous learning opportunities for those who are interested to learn new courses irrespective of curriculum. MOOCs provide learners to access resources from anywhere. With the changes in technology and availability of various tech gadgets people are interested to get access of[1] resources in these gadgets and are interested to learn online rather than traditional mode. By identifying the shift in learning process of learners most of the Universities are offering online modules in the form of MOOCs and they also made it as a part of curriculum. This paper mainly focuses on historical background, types, essential characteristics, trends, advantages and disadvantages of MOOCs.