The role of the Golgi apparatus in cells is primarily related to protein modification, sorting, and packaging for secretion or delivery to various cellular locations. Proteins synthesized in the endoplasmic reticulum are transported to the Golgi apparatus, where they undergo post-translational modifications, such as glycosylation or phosphorylation. The Golgi then sorts these proteins and packages them into vesicles, directing them to their final destinations, which may include the cell membrane or lysosomes. This organelle plays a crucial part in maintaining cellular functions and ensuring proper distribution of biomolecules throughout the cell.