Over the last few years, the use of online social networks has increased exponentially, and some of these "virtual communities" are among the most visited sites on the Internet. With this boom in popularity has also come a rise in the need for learning within these spaces, and very little academic literature exists on how to best utilize and establish this newand budding arena for learning particularly online sharing i.e. e-learning. Traditional way of learning approaches for education and knowledge gain are no longer adequate, as online environments have completely radicalized. This book, therefore, provides a new metric of learning, that is Cloud computing which introduces efficient scale mechanism can let construction of e-learning system be entrusted to suppliers and provide a new mode for e-learning. In traditional web-based e-learning mode, system construction and maintenance are furnished completely within the educational institutions or enterprises, which results in lot of problems, such as huge investment, but with no capital gains to return. We supplement cloud computing cloud computing into e-learning is feasible and it can greatly improve the efficiency of investment