The hunter-gathers are nomads that follow the herd that they depend on for food. They lived in temporary tents and ate berries and meat.
domestication is to make something useful and after they started to do it they could support more and stay in permanent place.
Agriculture made them plant and domesticate the things that they eat, and it lets them start villages plus have more families in a community. Due to this, people started to master something like blacksmiths.