Calibration in augmented reality involves the process of aligning virtual objects with the real-world environment to ensure accurate and seamless integration. It adjusts for variations in device sensors, optics, and spatial relationships, ensuring that virtual elements are positioned correctly and maintain their intended size and orientation. Calibration is vital for delivering a coherent augmented reality experience where digital content accurately corresponds to the user's surroundings. The process can involve manual adjustments or automatic algorithms that account for factors like camera distortion and perspective. Proper calibration enhances the realism and usability of AR applications, enabling users to interact convincingly with virtual content.