Quantum computing is an advanced form of computing that uses principles of quantum mechanics to perform calculations, allowing it to solve certain complex problems much faster than classical computers. Instead of classical bits (0s or 1s), it uses quantum bits, or qubits, which can exist in multiple states simultaneously through a property called superposition. This allows quantum computers to explore many potential solutions at once and leverage entanglement to link qubits, which is key to their potential speed and power for tasks like drug discovery, materials science, and financial modeling