Gels are semi-solid materials that consist of a network of molecules dispersed in a liquid. They have unique properties that allow them to maintain their shape while still being flexible. Common examples of gels include gelatin, used in desserts, and hair gel, which helps style hair. Gels can be found in various applications, including food, cosmetics, and pharmaceuticals. In the medical field, hydrogel is often used for wound dressings due to its ability to retain moisture and promote healing. The versatility of gels makes them important in both everyday products and specialized industries.