Quantum Error Correction refers to a set of techniques used in quantum computing to address errors that inevitably arise due to the delicate nature of quantum systems. In classical computing, errors are typically corrected through redundancy and error-detection codes. However, the principles governing quantum mechanics introduce unique challenges and opportunities in error correction. In quantum computing, information is stored in quantum bits or qubits, which can exist in superposition states, allowing them to represent multiple values simultaneously. Moreover, qubits can be entangled, meaning the state of one qubit is dependent on the state of another, even if they are physically separated. These characteristics make quantum computing incredibly powerful but also prone to errors. The primary sources of errors in quantum computing include decoherence, which is the loss of quantum coherence due to interactions with the environment, and noise arising from imperfect operations on qubits.