Protein trafficking is the process by which proteins are transported within and between cells. This process is essential for maintaining cellular function and plays a critical role in various cellular processes, such as cell signaling, metabolism, and communication. Protein trafficking involves the movement of proteins to specific cellular compartments, such as the cell membrane, nucleus, endoplasmic reticulum, and lysosomes, where they can perform their designated functions. Dysregulation of protein trafficking has been implicated in various diseases, including cancer, neurodegenerative disorders, and infectious diseases. Researchers study protein trafficking to better understand the mechanisms involved and to develop targeted therapies for treating diseases associated with protein trafficking defects.