Superconducting circuits are electrical circuits made from materials that exhibit superconductivity, a phenomenon where they can conduct electricity without resistance when cooled below a certain temperature. This allows for the efficient flow of electrical current, enabling faster and more reliable performance in various applications, including quantum computing and sensitive measurement devices. These circuits often use superconducting materials like niobium or lead and are typically cooled using liquid helium or cryocoolers. Superconducting circuits are crucial in the development of quantum bits or qubits, which are the building blocks of quantum computers, allowing for advanced computational capabilities.