High-temperature superconductivity is a quantum mechanical state of matter exhibited by certain materials that display zero electrical resistance and expel magnetic fields (Meissner effect) below a critical temperature significantly higher than that of conventional superconductors. It constitutes a major field of academic research dedicated to investigating these materials and the fundamental physical mechanisms responsible for superconductivity at elevated temperatures. This field encompasses the synthesis and characterization of high-temperature superconducting materials, the exploration of their unconventional electronic and magnetic properties, and the development of theoretical models to explain the pairing of charge carriers at higher temperatures. Its significance lies in challenging established theories of superconductivity and its potential for transformative technological applications requiring operation at more accessible temperatures.