Agarose Gel Loading Buffer-Glycerol is primarily used in molecular biology for preparing DNA, RNA, or protein samples for electrophoresis. It helps in tracking the migration of samples during the process by providing a visible dye front. The glycerol in the buffer increases the density of the sample, ensuring it sinks properly into the wells of the agarose gel. This buffer is essential for achieving clear and accurate separation of nucleic acids or proteins, making it a crucial component in techniques like PCR analysis, restriction enzyme digestion, and other applications requiring gel electrophoresis.