Staffing involves filling positions in an organization through recruitment, selection, induction, training, and placement of employees. It is affected by internal factors like promotion policies and external factors like labor laws. The steps in staffing are recruitment to source candidates, selection to evaluate candidates, induction to onboard new hires, training and development to educate employees, and placement to allocate employees to roles. Effective staffing helps organizations acquire and develop motivated workforces to achieve goals.