Quantum error correction is a subfield of quantum computing that focuses on developing techniques to protect quantum information from errors that can occur due to noise and imperfections in quantum hardware. The goal of quantum error correction is to ensure the reliability and stability of quantum computations by correcting errors that may disrupt the quantum states necessary for computation. Quantum error correction involves encoding quantum information in a redundant way so that errors can be detected and corrected. This typically involves creating entangled states, known as quantum error correcting codes, which can spread the information across multiple qubits in a way that makes it possible to identify and correct errors. These codes are designed to be fault-tolerant, meaning that even if errors occur, the quantum information can still be reliably recovered without losing coherence. Quantum error correction is a crucial area of research in quantum computing, as errors are an inherent aspect of quantum systems due to their sensitivity to noise and decoherence. By developing effective error correction techniques, researchers aim to improve the stability and scalability of quantum computers, ultimately paving the way for practical and reliable quantum computing technologies.