Stains are vital in histology because they enhance the contrast of tissue sections, making different components more visible under a microscope. Various staining techniques are used to highlight specific elements within a tissue. For example, Hematoxylin and Eosin (H&E) staining is a common method where hematoxylin stains cell nuclei blue, and eosin stains cytoplasm and extracellular matrix pink. This differential staining allows for more detailed observation and identification of cellular structures, aiding in the diagnosis of diseases and the study of tissue organization.