Identifying molecular subtypes is crucial for several reasons: 1. Personalized Medicine: Different subtypes respond differently to treatments. By understanding the molecular characteristics, doctors can prescribe targeted therapies that are more effective and have fewer side effects. 2. Prognosis: Certain subtypes are associated with better or worse outcomes. Knowing the subtype helps in predicting disease progression and survival rates. 3. Research and Drug Development: Molecular subtyping aids in the discovery of new therapeutic targets and the development of novel drugs.