Lipid rafts are small, dynamic microdomains within the cell membrane that are rich in cholesterol and sphingolipids. These structures play a crucial role in organizing membrane proteins and lipids, facilitating cellular processes such as signaling and communication. Their unique composition allows them to float within the more fluid regions of the membrane, acting as platforms for various biochemical interactions. These rafts are involved in several important cellular functions, including immune response and cell signaling. By clustering specific proteins, lipid rafts help to enhance the efficiency of signaling pathways, allowing cells to respond more effectively to external stimuli.