Describe the trade between nomads and sedentary / people and why was this trade important

The people with a sedentary lifestyle which means we're talking about people who grew crops at the time for which this question is being asked, could supply nomadic people with crops and crop-related goods that the people who were of nomadic origin couldn't have themselves. In turn, nomadic people could support farmers and agricultural people with different goods they had more off - for example exotic or just wild game in the form of meat, etc.