Majority of businesses work primarily for their own prosperity and growth. Their number one goal is to increase revenue, prosper through goods / services and ideas. In order for business to grow and produce revenue they must sell to the community. This allows a better standard of living and freedom of choice. As a company grows they must hire more employees to keep up with demand, this produces more job opportunities. These benefits towards a society are known as the invisible hand.
A farmer grows his crops, hires locals to help harvest. Then supplies the community with fresh vegetables.