Glycosylation is a complex process in which sugar molecules, also known as glycans, are attached to proteins, lipids, or other biomolecules. This post-translational modification plays a crucial role in various biological processes, such as cell signaling, protein folding, immune response, and cell-cell adhesion. Glycosylation is also important for the structural integrity and stability of proteins, as well as for their interaction with other molecules. Abnormal glycosylation has been linked to various diseases, including cancer, autoimmune disorders, and neurodegenerative diseases. Researchers in the field of glycosylation study the mechanisms and functions of this process, as well as its role in health and disease.