Quantum computers are advanced computing devices that use the principles of quantum mechanics to process information. Unlike traditional computers, which use bits as the smallest unit of data (0s and 1s), quantum computers use qubits. Qubits can represent multiple states simultaneously, allowing quantum computers to perform complex calculations much faster than classical computers. These machines have the potential to solve problems that are currently intractable for classical computers, such as optimizing large systems or simulating molecular interactions. As research in quantum computing progresses, it could revolutionize fields like cryptography, materials science, and artificial intelligence.