If you have been at the receiving end of a bad car salesman, you would have received an ear-bashing about how good the car is, all the gadgets it contains, how fast (or safely) you can go, and what range of colours you can get it in.
If, on the other hand, you have met a good car salesman, you probably walked away with the car at the end of your meeting.
Because the good car salesman would have asked about your family and friends, talked about what cars you have owned before, asked about where you live and where you work.
This might sound like friendliness, and might have initially annoyed you (“I’m here to look at a car, not to have a chat!”), but at the end when he showed you the car and suggested how it and its features might fit with your lifestyle, you got to like him or her!
That good salesman knew that he wasn’t there to sell you something but to help you receive a benefit.