4-Phenyl-1-butanol is primarily used in the synthesis of fragrances and flavoring agents due to its pleasant aromatic properties. It serves as an intermediate in the production of various compounds used in perfumes, cosmetics, and food additives. Additionally, it finds application in organic synthesis, particularly in the creation of pharmaceuticals and fine chemicals, where it acts as a building block for more complex molecules. Its role in research and development is also notable, as it is utilized in studies related to chemical reactions and material science.