A qubit is the basic unit of information in quantum computing, analogous to a classical bit in traditional computing. Unlike a classical bit, which can be either 0 or 1, a qubit can exist in a state of 0, 1, or both simultaneously due to a property called superposition. This allows quantum computers to process a vast amount of information more efficiently than classical computers. Another important property of qubits is entanglement, which enables qubits that are entangled to be correlated with each other, regardless of the distance separating them. This means that the state of one qubit can depend on the state of another, allowing for complex computations. Together, superposition and entanglement make qubits a powerful tool in the field of quantum computing, potentially revolutionizing technology and problem-solving.