Quantum computing is a type of computing that uses the principles of quantum mechanics to process information. In classical computing, information is represented in bits that can be either 0 or 1. In quantum computing, information is represented in quantum bits, or qubits, which can be both 0 and 1 at the same time, a phenomenon known as superposition.

This property of superposition allows quantum computers to perform certain types of calculations much faster than classical computers. Quantum computers use quantum gates, which are similar to classical logic gates, to manipulate qubits and perform computations. The more qubits a quantum computer has, the more powerful it is.

Quantum computing has the potential to revolutionize fields such as cryptography, optimization, and drug discovery, among others. However, it is still a developing technology, and building practical quantum computers with enough qubits to outperform classical computers remains a challenge.