Cellular trafficking is a process by which cells transport molecules, proteins, and other substances within and between different cellular compartments. This process plays a crucial role in maintaining cell function, communication, and overall cellular health. Cellular trafficking involves the movement of molecules through various organelles such as the endoplasmic reticulum, Golgi apparatus, and lysosomes, as well as transport between the cell membrane and extracellular space. Dysregulation of cellular trafficking has been linked to numerous diseases, including cancer, neurodegenerative disorders, and infectious diseases. Research in this area aims to better understand the mechanisms of cellular trafficking and develop targeted therapies to treat associated diseases.