Quantum metrology is a research area that explores the use of quantum systems and techniques to improve the precision and accuracy of measurements. By harnessing the principles of quantum mechanics, researchers are able to develop new methods and technologies that can achieve measurements beyond the limitations of classical physics. Quantum metrology has the potential to revolutionize fields such as navigation, telecommunications, and scientific research by enabling ultra-precise measurements and detection of signals. Key concepts in quantum metrology include entanglement, superposition, and quantum-enhanced sensing techniques.