Quantum computing differs from classical computing primarily through its use of qubits, which can represent and process information in ways that classical bits (0s or 1s) cannot. While classical computers perform operations sequentially, quantum computers exploit quantum mechanics principles like superposition and entanglement, allowing them to process multiple possibilities simultaneously. This capability potentially enables quantum computing to solve certain problems, like factoring large numbers or simulating molecular structures, much faster than classical computers. As a result, quantum computing holds promise for advancements in fields such as cryptography, materials science, and complex system modeling.