Used primarily as a key intermediate in organic synthesis, especially in the preparation of natural products and pharmaceuticals. Its reactive exocyclic methylene group allows for various cycloaddition and conjugate addition reactions, making it valuable in constructing complex ring systems. Commonly employed in the synthesis of terpenoids and lactone-containing bioactive molecules. Also utilized in fragrance chemistry due to its lactone structure, contributing to sweet, creamy, or fruity aroma profiles in flavor and perfume formulations.