Gels are semi-solid materials that have a jelly-like consistency. They are formed when a liquid is mixed with a gelling agent, which helps to stabilize the mixture and create a three-dimensional network. Common gelling agents include agar, gelatin, and pectin. Gels are widely used in various industries, including food, cosmetics, and pharmaceuticals, due to their unique texture and ability to hold moisture. In the culinary world, gels are often used to create desserts like jellies and panna cotta. In cosmetics, gels serve as bases for products like hair gel and facial masks. Additionally, in medicine, gels can be used for drug delivery systems, allowing for controlled release of medications.