Immunofluorescence is a specialized technique used in biomedical research to visualize and localize specific proteins, antigens or other molecules within cells or tissues. It involves the use of fluorescently-labeled antibodies or other probes to bind to the target molecules, which can then be visualized under a fluorescence microscope. Immunofluorescence is a powerful tool for investigating cell biology, disease mechanisms, and drug discovery, and requires specialized knowledge and expertise to execute effectively.