A clinical nurse specialist (CNS) is an advanced practice registered nurse who specializes in a specific area of healthcare, such as pediatrics, oncology, or cardiology. They provide expert care, conduct assessments, and develop treatment plans for patients. CNSs also play a key role in educating patients and their families about health conditions and self-care. In addition to direct patient care, clinical nurse specialists often collaborate with other healthcare professionals to improve patient outcomes and enhance healthcare practices. They may also engage in research and contribute to the development of clinical guidelines, ensuring that the latest evidence-based practices are implemented in their specialty area.