Social Engineering deals with non-technical kind of intrusion and manipulation that relies heavily on human interaction rather than technology. Social Engineering is popular because the human element is frequently the weakest part of a system and most prone to mistakes. Free online Social Engineering and Manipulation Training class from Cybrary is designed for programmers and technology experts, as well as non-tech people who are an easy target for social engineers. The impact of social engineering has been the primary cause of a number of the most high profile cyber-attacks in recent years.
Source: https://thehackernews.com/2015/10/free-social-engineering-training.html