E-learning refers to the practice of improving learning by using, managing and creating technological processes and resources in order to enhance performance. The subject includes various different aspects such as online learning, learning theory, m-learning, computer-based training, etc. There are three fundamental schools of thought included in e-learning namely, behaviorism, constructivism and cognitivism. The different media tools used in e-learning are computers, mobile devices, tablets, webcams, social networks, virtual classrooms, etc. E-learning helps in facilitating the access to education for all, especially non-full-time students. This book provides significant information on this discipline to help develop a good understanding of e-learning and related fields. The various advancements in this field are glanced at and their applications as well as ramifications are looked at in detail. It will help the readers in keeping pace with the rapid changes in this area.