Staining techniques are methods used in microscopy to enhance the visibility of cells and tissues. By applying specific dyes or stains, researchers can highlight different structures within a sample, making it easier to observe and analyze. Common stains include Hematoxylin for nuclei and Eosin for cytoplasm, often used together in H&E staining. These techniques are essential in fields like histology and pathology, where understanding the composition and organization of tissues is crucial. Staining can reveal important information about cellular function, disease states, and overall tissue health, aiding in diagnosis and research.