Magnetic resonance is a fundamental physical phenomenon where certain atomic nuclei or electrons, possessing a magnetic moment, absorb and re-emit electromagnetic radiation at specific resonant frequencies when placed in a strong static magnetic field and subjected to an oscillating magnetic field. As a research concept and spectroscopic/imaging methodology, it investigates the properties of matter by probing the behaviour of these spins, yielding detailed information about molecular structure, dynamics, composition, and spatial distribution. Its significance lies in its non-destructive nature and its broad application as a powerful analytical tool in physics, chemistry, materials science, biology, and medical imaging (MRI).