Qubits are very fragile and are prone to errors due to decoherence and other quantum noise. However using quantum error correction qubit errors can be corrected.
In this tutorial you will see how a specific type of error called a bit flip error can be corrected using a quantum circuit known as the bit flip code.
https://quantumcomputinguk.org/tutorials/quantum-error-correction-bit-flip-code-in-qiskit