Agar, also known as kanten, is a gelatinous substance derived from seaweed. It is commonly used as a vegetarian alternative to gelatin in various recipes. Agar has a neutral taste and is available in powder or flake form. It is often used in desserts, such as jellies, puddings, and fruit gels. Agar sets at room temperature and does not require refrigeration to solidify. It is a versatile ingredient that can be used in both sweet and savory dishes.