It is the basic unit of information in a quantum system and is analogous to a classical bit.
The qubit is the building block of quantum computing. It is the basic unit of information in a quantum system and is analogous to a classical bit. However, unlike classical bits, which can only represent a 0 or a 1, qubits can exist in a superposition of states, representing a combination of 0 and 1 simultaneously. This superposition allows qubits to hold exponentially more information than classical bits, resulting in the exponential computational power of quantum computers.