what is quantum computing used for?

How does quantum computing excel in areas like cryptography, where Shor's algorithm can factorize large numbers exponentially faster than classical algorithms? What role does quantum computing play in optimizing large-scale systems, such as logistics and supply chain management, through algorithms like the quantum approximate optimization algorithm (QAOA)? How is quantum computing advancing fields like material science and drug discovery by simulating molecular structures and chemical reactions more accurately? Additionally, how can quantum computing enhance machine learning and artificial intelligence by improving the efficiency and capability of algorithms?