WHAT IS SOCIAL ENGINEERING???

I checked with dictionary. It means like deceit.I found so.
I don't know the detail about that, but I associated with Internet auctions.
When I looking for something that I wanted, of course, I might buy it.
However, after I paid money, the item doesn't come. I can't contact with the person who sold that items.
On the other hand, if I am the seller, after I sent items, the guest doesn't pay money.
I have never use Internet auction yet, because I think these bad things.
I avoid the event which has to do with money.
We tend to be careless about this thing, because we can use Internet anywhere and anytime we want. To use Internet is close to our life.
We can't see the users' faces, so we have to be careful.