If u ask some new comer in gym about why are you here ? His answer will be something like that " I want to do weight lifting " or  he say" I am here for Body building" without even knowing the difference between these two.
So that article will simply highlight difference between body building and Weight lifting.
Body Building is simply means building the body.(building of muscles for beauty of body). So Bodybuilding involves  reputation of exercise with same weights to build shapeful muscles.primary target here is not building strength but muscles. For example you can say that a bodybuilder needs to repeat barbell curls of same weight. So definitely it will not enhance his strength much.
While weight lifting  is mainly focused on building strength but not on shape of body. A good example could be that you can compare body of WWE wrestler Mark Henry who is weight lifter 
And  of Triple H who is body builder.
So next time answer in gym with confidence what you want to do here