An NMR spectrometer is a scientific instrument used to analyze the structure of molecules. It works by applying a strong magnetic field to a sample, causing the nuclei of certain atoms, like hydrogen or carbon, to resonate at specific frequencies. By measuring these frequencies, researchers can gather information about the molecular structure and dynamics of the sample. The data obtained from an NMR spectrometer is presented as a spectrum, which displays peaks corresponding to different atomic environments within the molecule. This information is crucial in fields such as chemistry, biochemistry, and pharmaceutical research for understanding molecular interactions and developing new compounds.