What Is "Social Engineering"?

Social Engineering means to get any personal or important information by breaking security without using any technical skills.
To do it, Just tricky communication skills are needed to gain reliance from the target. For instance, social engineers use technical language, or pretend to have special and professional knowledge about a certain field. Why can people doubt experts? Moreover, targets usually tend to want to be ‘helpful’ for these people; therefore, if they trust them, they are easy to tell information in order to ‘help’ them. Not only targets trust the ‘reliable’ strangers, also they often do not notice the value of information; they do not know information technology has an extraordinary influence on the society. However, it is actually hard to distinguish correct people from the false ones.
It can be necessary and emergency issue that victims have a responsibility to realize the real importance of information they treat. It is wrong to criticize only the act of Social Engineering. People have to realize that information becomes both useful and dangerous.