Co-working refers to shared workspaces used by independent professionals, freelancers, and small businesses. It allows people working for different companies to share office space, equipment, ideas, and knowledge. Key benefits include lower costs than traditional office space, a sense of community among like-minded individuals, and flexibility to work from various locations. Factors driving the growth of co-working include the emphasis on people, community, costs, sustainability, transportation, and technology in the modern workplace.