Quantum computers are advanced machines 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 quantum bits, or qubits. Qubits can exist in multiple states at once, allowing quantum computers to perform complex calculations much faster than classical computers. These computers have the potential to solve problems that are currently intractable for classical systems, such as optimizing large systems or simulating molecular interactions in chemistry. As research continues, quantum computing could revolutionize fields like cryptography, artificial intelligence, and materials science.