What Is "Social Engineering"?

I think that the computers are not only of convenience but also of danger. Now the computers are becomes the part of our life. It may be safely said that not a day passes but I use or see the computers. People do a lot of things with the computers now. Some who are addicted to it can make the virus to make others computers bad or change. I look on them as a kind of genius. They have lots of knowledge or information about the computers. They are too familiar the computer so they can control the other’s computer with ease. I am not pretty good at the computers so I am at a loss what to explain or write as to that, but people had better take heed of everything when using the computer.