A lipid raft is a specialized microdomain within a cell membrane that is rich in certain types of lipids, such as cholesterol and sphingolipids. These rafts are thought to play a crucial role in organizing membrane proteins and facilitating cellular processes like signaling and transport. Their unique composition allows them to float within the more fluid regions of the membrane, creating distinct areas for specific functions. Lipid rafts are important for various cellular activities, including cell signaling and immune responses. They help cluster receptors and other proteins, enhancing the efficiency of communication between cells. Research into lipid rafts continues to reveal their significance in health and disease, including their role in viral infections and neurodegenerative disorders.