The main role of a Certified Nurse Assistant (CNA) is to provide basic care to patients and assist them in daily activities that include bathing, dressing, feeding and taking vital signs. The role of a CNA is extremely essential in long term care. CNAs often spend the most time with residents, which enables them to quickly identify changes in condition and help to ensure timely care. Compassionate individuals with a deep desire to care for others are needed to fill these positions.