Liquid chromatography (LC) is a versatile analytical technique used for separating, identifying, and quantifying components in a mixture. It operates based on the differential interactions between sample components and a stationary phase packed in a column, and a mobile phase that carries the sample through the column. LC can be performed in various modes including reversed-phase chromatography, normal-phase chromatography, ion-exchange chromatography, size-exclusion chromatography, and affinity chromatography, offering different separation mechanisms. LC is widely used in pharmaceuticals, environmental analysis, food and beverage, clinical diagnostics, and research for analyzing complex mixtures and identifying compounds. It offers high resolution, sensitivity, and selectivity, making it suitable for a wide range of applications. LC can be coupled with various detectors such as UV-Vis, fluorescence, mass spectrometry, and refractive index detectors to enable detection and quantification of separated analytes. Advances in column technology, instrumentation, and data analysis software continuously improve the efficiency and accuracy of LC analysis. Collaboration between researchers, industry professionals, and regulatory agencies drives innovation and adoption of LC techniques in various scientific disciplines.